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1. b) I multiplied 100 by 10, and then by 100.
2. 1 000 000 cm 10 100 000 dm
100 000 dm 10 10 000 m
10 000 m 1000 10 km
1 000 000 cm 10 10 000 000 mm
4. a) $1 000 000 $100 000 per day 10 days
b) $1 000 000 $10 000 per day 100 days
c) $1 000 000 $1000 per day 1000 days
d) $1 000 000 $100 per day 10 000 days
e) $1 000 000 $10 per day 100 000 days
5. Estimate: about 18 million centimetres
Answer: 20 million centimetres, or 200 000 m
My estimate was low because I estimated the length of
1 straw to be 18 cm, but it is 20 cm long.
100
1000
10 000
10 000
10 times
100 times
1
2
6. The class gets h of recess each day.
How many days would it take to get 1 000 000 min of recess?
(About 33 334 days)
REFLECT: To figure out how many days there are in 1 million
seconds, I would divide 1 million by 60 to get minutes. Then
I would divide the quotient by 60 to get hours, and divide that
quotient by 24 to get days. (Answer: between 11 and 12 days)
About 10 days
Numbers Every Day
Students should recall that equivalent decimals have the same
value. Some students may wish to use Base Ten Blocks or
hundredths grids.
ASSESSMENT FOR LEARNING
What to Look For
What to Do
Reasoning; Applying concepts
✔ Students understand that numbers
are based on groupings of ten.
✔ Students have a sense of the magnitude
of the number 1 million.
Extra Support: Provide opportunities for students to use a
calculator to count by 1000s, 10 000s, and 100 000s to 1 million.
Students can use Step-by-Step 1 (Master 2.9) to complete
question 2.
Accuracy of procedures
✔ Students can determine relationships
among pairs of numbers in the 1, 10,
100, 1000, 10 000, 100 000,
1 000 000 sequence.
Extra Practice: Have students work in pairs to make a
poster showing different ways to make 1 million (for example,
1000 thousands; 100 10 000).
Students can complete Extra Practice 1 (Master 2.22).
Extension: Challenge students to solve this problem:
Suppose you saved $100 a month. How many months would
it take until you could trade your savings for 1 million pennies?
1 million nickels? (Answers: 100 months; 500 months)
Recording and Reporting
Master 2.2 Ongoing Observations:
Whole Numbers
6
Unit 2 • Lesson 1 • Student page 34
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2.9
31.7
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