Find the Sum 1
Rounding to Estimate
Add Mentally
Regroup Hundreds to Thousands
Find the Sum 2
100
4 + 5 + 3 + 6
What is 18
100
44 + 77
What is 120
100
12 + 35
What is 47
100
25 hundreds
What is 2 thousands, 5 hundreds
100
9 + 12 + 6
What is 27
200
9 + 5 + 7 + 5
What is 26
200
45 + 643
What is 650
200
15 + 68
What is 83
200
48 hundreds 12 tens
What is 4 thousands, 9 hundreds, 2 tens
200
12 + 10 + 46 + 7
What is 75
300
56 + 49 + 27
What is 132
300
678 + 567
What is 1200
300
54 + 32
What is 86
300
50 hundreds
What is 5 thousands
300
25 + 93 + 36 + 44
What is 198
400
483 + 223 + 236
What is 942
400
5423 + 451
What is 5500
400
39 + 21
What is 60
400
67 hundreds
What is 6 thousands, 7 hundreds
400
564 + 387 + 291
What is 1,242
500
5984 + 7234
What is 13,218
500
2099 + 7402
What is 9000
500
35 + 75
What is 110
500
7 thousands 22 hundreds
What is 9 thousands, 2 hundreds
500
2568 + 4839 + 3734
What is 11,141
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