Mental Math
Rounding Whole Number and Decimals
Estimating Sums and Differences
Add and Subtract Decimals
Add and Subtract Whole Numbers
100
66+18+2
What is 86
100
12,064 Round to nearest hundred
What is 12,100
100
79+32
What is 110
100
6.9+2.8
What is 9.7
100
18,269+109,347
What is 127,616
200
237+195+5
What is 437
200
0.758 Round to nearest hundredth
What is 0.76
200
184-58
What is 120
200
9.001+1.999
What is 11.000
200
113,300-1,774
What is 111,526
300
468-190
What is 278
300
738.29 Round to the nearest tenth
What is 738.3
300
7,889+6,455
What is 14,000
300
15.03-4.121
What is 10.909
300
5,741+31,018
What is 36,759
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