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Mental Math: 10s
Mental Math: 100s
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What's missing?
100
25, 30, 35, 40, ___, ___, ___
45, 50, 55
100
What is 10 more than 43?
53
100
What is 100 more than 154?
254
100
Use a number line to add 31 + 15.
46
100
47, 57, ___, 77, 87
67
200
70, 80, 90, ___, ___, ___
100, 110, 120
200
What is 10 less than 97?
87
200
What is 100 less than 901?
801
200
Use a number line to add 54 + 17.
71
200
105, 110, ___, 120, 125
115
300

0, 1, 1, 2, 3, 5, _, 13, 21, 34

What is 8?

300
What is 10 more than 123?
133
300
What is 100 more than 49?
149
300
Use a number line to solve 45 - 16.
29
300
124, 134, ___, 154, 164
144
400
34, 44, 54, ___, ___, ___
64, 74, 84
400
What is 10 less than 265?
255
400
What is 100 less than 201?
101
400
Use a number line to solve 80 - 47.
33
400
290, 295, ___, 305, 310
300
500
321, 421, 521, ___, ___, ___
621, 721, 821
500
What is 10 more than 391?
401
500
What is 100 more than 738?
838
500
Use a number line to solve 100 - 73.
27
500
680, 690, ___, 710, 720
700
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