Front End Estimation
Adding with Regrouping
Three or More Addends
Subtraction with regrouping
Mixed
100
646-519
What is 100
100
168 + 743
What is 911
100
27 + 34 + 61 + 58
What is 180
100
429 - 75
What is 354
100
9002 - 7865
What is 1137
200
212 + 672 + 827
What is 1700
200
.46 + .28
What is .74
200
15 + 70 + 46 + 22
What is 153
200
922-734
What is 188
200
5000 - 718
What is 4282
300
963 - 315
What is 600
300
3670 + 3458
What is 7128
300
247 + 191 + 322 + 423
What is 1183
300
653 - 578
What is 75
300
70,064 - 19,155
What is 50,909
400
3235 + 5871 + 1886
What is 11,000
400
6655 + 1563
What is 8218
400
316 + 875 + 26 + 6
What is 1223
400
9743- 4467
What is 5276
400
75,628 + 8,073 + 48
What is 83,749
500
5460 - 1509
What is 4000
500
5538 + 614
What is 6152
500
3219 + 8604 + 6154
What is 17,977
500
634- 58
What is 576
500
81,000 - 19,625
What is 61,375
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