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S H O W W H AT Y O U K N O W
Quit
40–50 min
LESSON ORGANIZER
Optional
Base Ten Blocks
blank number lines (PM 16)
Student Materials
calculators
Assessment
5 900 000
Master 4.1 Unit Rubric: Decimals
Master 4.4 Unit Summary: Decimals
1 450 000 000
5
1000
1.172
2.06
3
10
26
9.041
9.362, 9.49, 9.9
6.095, 6.318, 6.394
0.69, 0.7
10.074
8 750 000
104
7
1000
17.07, 17.1
6.25, 6.2
6.707
70
0.1862
2.159
0.1385
0.0002
63 890
0.035
0.234 m, 234 mm, 0.38 m, 380 mm
Sample Answers
4.
Tens
4
Ones
Tenths
Hundredths
Thousandths
0
2
1
7
0
2
0
9
1
4
6
8
7. 8.435, 8.436
I chose two numbers each with 8 ones. Both numbers
have more than 430 thousandths and fewer than 437
thousandths.
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Unit 4 • Show What You Know • Student page 162
9. a) About 6.793; I rounded 4.012 to 4, then added.
b) About 9; I rounded each number to the nearest
whole number, then subtracted.
c) About 0.89; I rounded each number to the nearest
hundredth, then subtracted. 0.95 0.06 0.89
10. a) 10.074 7.385 2.689
b) 6.707 2.378 9.085
c) 2.159 1.297 0.862
16. 0.385 L 4 1.54 L
1.54 L 1.5 L
So, Sebastian has more than enough milk.
17. 1.195 g 1.24 g 1.249 g 1.208 g 4.892 g
4.892 g 4 1.223 g
The average mass is 1.223 g.
18. They will each get $3.33 and there will be 1¢ left over.
$3.33 3 $9.99
$9.99 $0.01 $10.00
$10.00 cannot be divided exactly into 3 equal groups.
Home
21.63
0.106
2.28
0.37
0.008
1.7
Quit
0.519
79.216
0.02
0.825
74.7
0.875
1.34
136.125 kg
Yes
1.223 g
3.16 kg
ASSESSMENT FOR LEARNING
What to Look For
Reasoning; Applying concepts
✔ Questions 2 and 3: Student understands the relationship between fractions and decimals.
✔ Questions 4 and 7: Student understands decimal place value.
Accuracy of procedures
✔ Questions 5 and 6: Student can compare and order decimals.
✔ Question 8: Student can round decimals to nearest hundredth or tenth.
✔ Question 9: Student can estimate sums and differences of decimals.
✔ Question 10: Student can add and subtract decimals.
✔ Question 11: Student can multiply and divide decimals by 10, 100, and 10 000.
✔ Question 13: Student can use mental math to multiply whole numbers by 0.1, 0.01, and 0.001.
✔ Question 14: Student can multiply and divide decimals by a whole number.
Problem solving
✔ Questions 12, 15, 16, 17, 18, and 19: Student can solve problems involving decimals.
Recording and Reporting
Master 4.1 Unit Rubric: Decimals
Master 4.4 Unit Summary: Decimals
Unit 3 • Show What You Know • Student page 163
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