Fractions and Decimals 20, Multiplication and Division 22_Overview of Learning Plan (Year 5) ACMNA098, ACMNA101, ACMNA121 NSW MA3-6NA Dividing by single-digit numbers, dividing the remainder to create a fraction. THIS IS A SUMMARY OF THE LEARNING PLAN, DESCRIBING THE SEQUENCE OF LEARNING WHICH WILL OCCUR OVER MULTIPLE LESSONS. COMPLETE LEARNING PLAN STARTS ON THE NEXT PAGE. Divide by 2, dividing the remainder 1 by 2 to create a half. Divide by 6, dividing the remainder 5 by 6 to 5 create 6 . Children: divide by 2, for example, divide the remainder 1 by 2 to create a half, for example, divide by 6, for example, divide the remainder 5 by 6 to 5 create 6, for example, Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach Children ask one another questions about dividing the remainder to create a fraction, for example: How could we divide by 2? How could we divide our remainder 1 by 2? What is 1 divided by 2? What is half of 1? How could we divide by 6? How could we divide our remainder 5 by 6? What is 5 divided by 6? What is a sixth of 5? What does the vinculum mean? YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 1 Fractions and Decimals 20, Multiplication and Division 22_Explicit Learning Plan (Year 5) ACMNA098, ACMNA101, ACMNA121 NSW MA3-6NA THIS IS THE FULL LEARNING PLAN, WITH DETAILS OF ACTIONS AND QUESTIONS THAT MAY BE USED TO DEVELOP DEEP UNDERSTANDING OVER MULTIPLE LESSONS. Dividing by single-digit numbers, dividing the remainder to create a fraction. Resources: playing cards, strips of paper, pencil, paper EXPLICIT LEARNING What could we do? What language could we use to explain and ask questions? Focuses Children think about, talk and listen to a friend about, then have the children’s opportunity to share what they already know. thoughts on the concept, exposing current understanding and any misconceptions. Reviews seeing division in 2 ways, as ‘groups of …’ and as ‘… equal groups’. (Multiplication and Division 7) Record, for example, ‘groups of’ and ‘equal groups’ Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach ► Today brings an investigation about division. ► What do you know about division? ► Talk about division with a friend. ► Is anyone ready to share what they are thinking about division? We’ve investigated division. And we found that there are 2 ways we can see division. We found we could divide by making ‘groups of’. And we found that we could divide by making ‘equal groups’. We found that seeing dividing by as making ‘equal groups’ is more efficient when dividing larger numbers because we are finding a fraction of the number. YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 2 Reviews We’ve investigated division and fractions. And we found that dividing and finding a fraction are the same thing. We found that when we divide by 2, we are finding a half. We found that when we divide by 3, we are finding a third. We found that when we divide by 4, we are finding a quarter. We found that when we divide by 10, we are finding a tenth. We found that the denominator in the fraction tells us the number we have divided by. Record, for example, division by a number greater than 1 makes a number a number of times smaller. Record, for example, quotient We found that division by a number greater than 1 makes a number a number of times smaller. And we began to call the answer to a division, a quotient. We’ve investigated dividing numbers. We found that if we don’t know a quotient when we divide, we could partition the number then divide the parts and add the quotients. We found that when we divided a non-multiple, we had a remainder. dividing creates a fraction of the number. (Multiplication and Division 10 – 18, Patterns and Algebra 17) Record, for example, ÷ 2 = Reviews Record, for example, ÷ 4 = the denominator tells us the number we are dividing by. (Fractions and Decimals 7) Reviews dividing using properties and relationships, recording remainders as remainders. (Multiplication and Division 10 – 18, Patterns and Algebra 17) Record, for example, ÷ 3 = 1 2 1 3 1 4 Record, for example, ÷ 10 = 1 10 Record, for example, 335 ÷ 2 = 1 2 of 335 = Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 3 Introduces dividing using properties and relationships with the remainder divided to get a unit fraction. Record, for example, 1 335 ÷ 2 = 2 Reviews 300 + 30 + 5 dividing by 2 is halving. (Multiplication and Division 2, 10, Record, for example, Patterns and 335 ÷ 2 = Algebra 17) 300 + 30 + 5 Reviews partitioning using standard place value to divide by 2 because every tens number is divisible by 2. (Multiplication and Division 10, Patterns and Algebra 17) of 335 = 300 + 30 + 5 4 + 1 Today we’re going to investigate dividing the remainder as well. Let’s divide an odd number by 2. If we divide an odd number by 2, will we get a remainder? When we divide by 2, what fraction do we get? Will we get a number that is half as big? Let's record our number sentences as both divisions and as fractions. Let’s partition 335 into our preferred multiples of 2. We know that we can partition numbers using standard place value to divide by 2 because every tens number is a multiple of 2. Let’s partition 335 using place value. Is 5 a multiple of 2? 5 is not a multiple of 2. Let’s partition 5 into 4 and 1. Because 1 is less than 2, we can’t partition it into a multiple of 2. What does 300 divided by 2 equal? Does 300 divided by 2 equal 150? What is half of 300? Children partition as much as they need to. Record, for example, 1 300 ÷ 2 = 150 Record, for example, 30 ÷ 2 = 15 2 1 2 of 300 = 150 of 30 = 15 Record, for example, Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 4 Reviews 4÷2=2 1 2 of 4 = 2 Is half of 300, 150? What does 30 divided by 2 equal? Does 30 divided by 2 equal 15? What is half of 30? Is half of 30, 15? 1 What does 4 divided by 2 equal? 1 Does 4 divided by 2 equal 2? What is half of 4? Is half of 4, 2? So we’ve divided our partitions by 2 and we’ve found half of our partitions. In Year 3 and 4 we would have just recorded the 1 as remaining. But could we divide the remaining 1 by 2? Let’s investigate! Let’s record our number sentences. 1 divided by 2. And half of 1. Let’s look at the number sentence 1 divided by 2 first. So we want to divide 1 by 2. Here we have 1 strip of paper. dividing the parts by 2. Record, for example, 335 ÷ 2 = 300 + 30 + 5 300 ÷ 2 = 150 30 ÷ 2 = 15 Introduces dividing the remaining 1 to get a fraction. Record 1 ÷ 2 = 1 of 335 = 2 300 + 30 + 5 of 300 = 150 2 of 30 = 15 2 1 2 of 1 = Display 1 strip of paper, for example, Divide the 1 strip of paper into 2 equal parts, for example, Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 5 Introduces 1 divided by 2 equals a half. 1 Record, for example, 1 ÷ 2 = 2 Reviews a half of 1 is a Divide the 1 strip of paper in half, for example, half. (Fractions and Decimals 1, 2) 1 1 Record, for example, 1 ÷ 2 = 2 2 1 of 1 = 2 Let’s divide it into 2 equal parts. What fraction did we get? Did we get a half? Does 1 divided by 2 equal a half? Let’s look at the number sentence half of 1 now. So we want to find a half of 1. Here we have 1 strip of paper. Let’s fold it in half. What fraction did we get? Did we get a half? Is half of 1, a half? Is that why it is called a half? So we’ve divided all of our partitions by 2, and we’ve found a half of all our partitions. Let’s add all of the quotients together. What does 150 plus 15 plus 2 plus a half equal? Does 150 plus 15 plus 2 plus a half equal 167 and a half? So does 335 divided by 2 equal 167 and a half? Is half of 335, 167 and a half? Does that make sense? If we make 335 half as big, would it be about 167 and a half? Record, for example, 1 335 ÷ 2 = Reviews adding the quotients. of 335 = 2 300 + 30 + 5 300 ÷ 2 = 150 300 + 30 + 5 of 300 = 150 2 1 1 30 ÷ 2 = 15 of 30 = 15 2 1 4÷2=2 1÷2= of 4 = 2 2 1 1 2 2 1 1 150 + 15 + 2 + 2 = 167 2 of 1 = 1 2 1 1 150 + 15 + 2 + 2 = 167 2 1 Record, for example, 335 ÷ 2 = 167 2 1 1 of 335 = 167 2 2 Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 6 Reviews the vinculum means divided by. (Fractions and Decimals 19) 1 Point to the number sentence 1 ÷ 2 = 2 1 Circle the 1 on both sides of the equal sign, for example, 1 ÷ 2 = 2 1 Circle the 6 on both sides of the equal sign, for example, 1 ÷ 2 = 2 Point to the 1 divided by 2 on the left side, for example, 1÷2= 1 Let’s look closely at our number sentence, 1 divided by 2 equals a half. What does the equals sign mean? Does the equals sign mean that both sides are equal? We have a 1 on both sides. We have a 2 on both sides. The only other things we have is the division sign on one side and a vinculum on the other side. What must the vinculum mean? Must the vinculum mean divided by? Does the left side say ‘1 divided by 2’? Does the right side say ‘1 divided by 2? Does the fraction a half, mean ‘1 divided by 2’? 2 1 divided by 2 Point to the 1 divided by 2 on the left side, for example, 1 1÷2=2 1 divided by 2 Allow children time now to engage in guided and independent investigation of dividing numbers using properties and relationships, dividing remainder of 1 to create unit fractions. Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 7 Introduces dividing using properties and relationships with the remainder divided to get a non-unit fraction. Introduces dividing a number by 6 with remainder 5 divided as a fraction. Record, for example, 77 ÷ 6 = Record, for example, 77 ÷ 6 = 1 6 of 77 = Reviews dividing by 6 makes a sixth. (Multiplication and Division 15, Patterns and Algebra 17) Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach Let’s divided by 6. Let’s divide a non-multiple of 6, by 6. Is 77 a multiple of 6? We know that 78 is a multiple of 6, so 78 cannot be a multiple of 6. When we divide by 6, what fraction do we get? Will we get a number that is a sixth as big? Will we get a sixth of the number? How could we record this in a number sentence? Let's record our number sentence as both a division and as a fraction. Do both of these number sentences say the same thing? When we divide by 6, are we finding a sixth? How could we divide 77 by 6? Could we partition 77 using standard place value? Is 10 a multiple of 6? No, 10 is not a multiple of 6. Because 10 is not a multiple of 6, not every tens number will be a multiple of 6. YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 8 Reviews partitioning using standard place value to divide by 6 is not always efficient because not every tens number is divisible by 6. (Multiplication and Division 15, Patterns and Algebra 17) So partitioning a number using place value will not always be efficient. Is 60 a multiple of 6? Because 77 is higher than 60, could we partition 77 into 60? If we partition 77 into 60, how many will be in the other part? Will we have 17 in the other part? Let's partition 77 into 60 and 17. Did we partition 77 using non-standard place value? Is 17 a multiple of 6? No, 17 is not a multiple of 6. of 77 = How could we partition 17 into multiples of 6? 60 + 17 Could we partition 17 into 12 and 5? Because 5 is less than 6, we won’t be able to partition it into multiples of 6. Now that we have our preferred multiples of 6, could we start dividing by 6 using these multiples? What does 60 divided by 6 equal? Does 60 divided by 6 equal 10? What is a sixth of 60? Is a sixth of 60, 10? Record, for example, 1 77 ÷ 6 = of 77 = 6 60 + 17 60 + 17 Record, for example, 1 77 ÷ 6 = 6 60 + 17 12 + 5 12 + 5 Reviews dividing the parts by 6. Record, for example, 60 ÷ 6 = 10 1 6 of 60 = 10 Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 9 Record, for example, 12 ÷ 6 = 2 1 6 of 12 = 2 Introduces dividing the remaining 5 to get a fraction. Record 5 ÷ 6 = 1 6 5 divided by 6 5 equals 6. What does 12 divided by 6 equal? Does 12 divided by 6 equal 2? What is a sixth of 12? Is a sixth of 12, 2? So we’ve divided our partitions by 6 and we’ve found a sixth of our partitions. In Year 3 and 4 we would have just recorded the 5 as remaining. But could we divide the remaining 5 by 6? Let’s investigate! Let’s record our number sentences. 5 divided by 6 and a sixth of 5. Let’s look at the number sentence 5 divided by 6 first. So we want to find 5 divided by 6. Here we have 5 strips of paper. Let’s divide each strip into six parts. of 5 = Display 5 strips of paper, for example, Introduces Divide each of the 5 strips of paper into 6 equal parts, for example, Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 10 Here we have 1 divided by 6 equals 6 Here we have 2 divided by 6 equals 6 Here we have 3 divided by 6 equals 6 Here we have 4 divided by 6 equals 6 Here we have 5 divided by 6 equals 6 So what does 5 divided by 6 equal? Does 5 divided by 6 equal five-sixths? Let’s look at the number sentence a sixth of 5 now. So we want to find a sixth of 5. Here we have 5 strips of paper. Let’s fold each strip in sixths. Now we don’t want a sixth of 1, we want a sixth of 5. Here we have a sixth of 1. Here we have a sixth of 2. Here we have a sixth of 3. Here we have a sixth of 4. Here we have a sixth of 5. 1 Point to 1 divided by 6 = 6 , 2 2 divided by 6 = 6 , 3 divided by 6 = 3 6 4 , 4 divided by 6 = 6 , 5 divided 5 by 6 = 6 , for example, Divide each of the 5 strips of paper into 6 equal parts, for example, Introduces 1 6 5 of 5 = 6. Point to a sixth of 1, a sixth of 2, a sixth of 3, a sixth of 4 and a sixth of 5, for example, Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach 1 2 3 4 5 YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 11 Record, for example, Introduces 5 divided by 6 5 1 equals and 6 5 5÷6= Display 5 strips of paper, for example, 1 6 of 5 = 5 6 How many sixths in a sixth of 5? Are there 5 sixths in a sixth of 5? Does a sixth of 5 equal 5 sixths? Let’s look at the number sentences in a different way. So we want to divide 5 by 6 and we want to find a sixth of 5. Here we have 5 strips of paper. Let’s divide the 5 strips of paper into 6 equal parts. Have we divided the 5 strips into 6 equal parts? Here is 1 equal part. Here are 2 equal parts. Here are 3 equal parts. Here are 4 equal parts. Here are 5 equal parts. 6 of 5 = 6. Divide each of the 5 strips of paper into 6 equal parts, for example, Point to 1 equal part, 2 equal parts, 3 equal parts, 4 equal parts, 5 equal parts, 6 equal parts, for example, Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 12 Then if we join these 5 parts together we have another equal part - 6 equal parts. Have we divided 5 into 6 equal parts? What is the size of each part? Is each part, 5 sixths? What fraction do we get when we divide 5 by 6? Do we get 5 sixths? Does 5 divided by 6 equal 5 sixths? Can we see 5 divided by 6, and a sixth of 5 in more than one way? Which way makes more sense to you? Let’s look closely at our number sentence, 5 divided by 6 equals 5 sixths. What does the equals sign mean? Does the equals sign mean that both sides are equal? Circle the 5 on both sides of the equals sign, for example, 5 ÷ 6 = 6 5 We have a 5 on both sides. 5 We have a 6 on both sides. The only other things we have is the division sign on one side and a vinculum on the other side. What must the vinculum mean? Must the vinculum mean divided by? Describe the size of each part, for example, Record, for example, Reviews Record, for example, the vinculum means divided by. (Fractions and Decimals 19) 5÷6= 5÷6= 5 1 6 6 5 1 6 6 5 of 5 = 6 5 of 5 = 6 Circle the 6 on both sides of the equals sign, for example, 5 ÷ 6 = 6 5 Circle the division sign and the vinculum, for example, 5 ÷ 6 = 6 Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 13 Point to the 5 divided by 6 on the left side, for example, Does the left side say ‘5 divided by 6’? Does the right side say ‘5 divided by 6? Does the fraction 5 sixths, mean ‘5 divided by 6’? 5 5÷6=6 5 divided by 6 Point to the 1 divided by 2 on the left side, for example, 5 5÷6=6 5 divided by 6 Reviews adding the quotients. (Multiplication and Division 10 – 17, Patterns and Algebra 17) Record, for example, 77 ÷ 6 = 1 6 60 + 17 12 + 5 of 60 = 10 6 1 1 12 ÷ 6 = 2 6 1 5 5 of 77 = 60 + 17 12 + 5 60 ÷ 6 = 10 5÷6=6 So we’ve divided all of our partitions by 6, and we’ve found a sixth of all our partitions. 5 10 + 2 + 6 = 12 6 6 of 12 = 2 5 of 5 = 6 5 5 10 + 2 + 6 = 12 6 Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 14 5 Record, for example, 77 ÷ 6 = 12 6 1 6 5 of 77 = 12 6 Let’s add all of the quotients together. What does 10 plus 2 plus 5 sixths equal? Does 10 plus 2 plus 5 sixths equal 12 and 5 sixths? So does 77 divided by 6 equal 12 and 5 sixths? Is a sixth of 77, 12 and 5 sixths? Does that make sense? If we make 77 a sixth as big, would it be about 12 and 5 sixths? Allow children time now to engage in guided and independent investigation of dividing numbers using properties and relationships, dividing remainder other than 1 to create non-unit fractions. Website: http://www.alearningplace.com.au Email: [email protected] Twitter: @learn4teach YouTube: A Learning Place A Teaching Place Facebook: A Learning Place 15
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