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Using 10s Knowledge to Calculate

By the end of this activity you will be able to: Count on and back in 10s and 100s to find out the answers.

Using 10s Knowledge to Calculate

The difference between 75 and 15 is ______.
- 50
- 70
- 40
- 60
30 more than 404 is _______.
- 454
- 444
- 434
How much more do I need to add to 19 to make 56?
- 37
- 47
- 36
- 38
50 more than 800 is _______.
- 850
- 750
- 950
150 less than 1000 is _______.
- 950
- 750
- 850
Add 500 to 300 and you get _______.
- 700
- 900
- 800
What do I need to add to 67 to make 187?
- 110
- 120
- 100
- 130
300 less than 1000 is _______.
- 700
- 600
- 800
What do I need to subtract from 1000 to make 300?
- 800
- 600
- 500
- 700
Forty less than seventy is _______.
- 40
- 50
- 30

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