Mental Math
Greater Than/Less Than
Rounding
How Many 10s
!Surprise!
100
10,000 - _____ = 9,990
10
100
357 (___) 375
357 is less than 375
100
345 rounded to the nearest 10 is...
350
100
How many 10s are in: 100
10
100
What's missing: 3,102, 3,101, _____, 3,099, 3,098
3,100
200
5 + 88 =
93
200
529 (__) 3,529
529 is less than 3,529
200
1,258 rounded to the nearest 10 is...
1,260
200
How many 10s are in 200?
20
200
What is missing: 8,903, 8,893, 8,883, 8,873, ____
8,863
300
3,980 - ____ = 3,960
30
300
7,031 (__) 7,310
7,031 is less than 7,310
300
7,450 rounded to the nearest 100 is...
7,500
300
How many 10s are in 260?
26
300
____ is 100 less than 3,099.
2,999
400
199 + 9 =
208
400
5,316 (__) 4,918
5,316 is greater than 4,918
400
9,990 rounded to the nearest hundred is...
10,000
400
How many 10s are in 780?
78
400
9 + 8 =
17
500
659 + 6 =
665
500
5,698 (__) 5,698
5,698 is equal to 5,698
500
7,680 rounded to the nearest thousand is...
8,000
500
How many 10s are 1,030?
103
500
199 + 8 =
207
M
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