For problems 1-35, find the sums and differences.
Exercise 1
Solution
937
Exercise 2
Exercise 3
Solution
565
Exercise 4
Exercise 5
Solution
559
Exercise 6
Exercise 7
Solution
1,342
Exercise 8
Exercise 9
Solution
2,001
Exercise 10
Exercise 11
Solution
1,963
Exercise 12
Exercise 13
Solution
79,456
Exercise 14
Exercise 15
Solution
96,953
Exercise 16
Exercise 17
Solution
791,824
Exercise 18
Exercise 19
Solution
8,301
Exercise 20
Exercise 21
Solution
140,381
Exercise 22
Exercise 23
Solution
76,224
Exercise 24
Exercise 25
Solution
4,955
Exercise 26
Exercise 27
Solution
185,611
Exercise 28
Exercise 29
Solution
2,238
Exercise 30
Exercise 31
Solution
1,338
Exercise 32
Exercise 33
Solution
878
Exercise 34
Exercise 35
Solution
618,227
For problems 36-39, add the numbers.
Exercise 36
Exercise 37
Solution
1,621
Exercise 38
Exercise 39
Solution
484,601
For problems 40-50, combine the numbers as indicated.
Exercise 40
Exercise 41
Solution
19,853
Exercise 42
Exercise 43
Solution
1,702
Exercise 44
Exercise 45
Solution
1,114
Exercise 46
Exercise 47
Solution
1,300
Exercise 48
Exercise 49
Solution
2,718
Exercise 50
For problems 51-63, add and subtract as indicated.
Exercise 51
Subtract 671 from 8,027.
Solution
7,356
Exercise 52
Subtract 387 from 6,342.
Exercise 53
Subtract 2,926 from 6,341.
Solution
3,415
Exercise 54
Subtract 4,355 from the sum of 74 and 7,319.
Exercise 55
Subtract 325 from the sum of 7,188 and 4,964.
Solution
11,827
Exercise 56
Subtract 496 from the difference of 60,321 and 99.
Exercise 57
Subtract 20,663 from the difference of 523,150 and 95,225.
Solution
407,262
Exercise 58
Add the difference of 843 and 139 to the difference of 4,450 and 839.
Exercise 59
Add the difference of 997,468 and 292,513 to the difference of 22,140 and 8,617.
Solution
718,478
Exercise 60
Subtract the difference of 8,412 and 576 from the sum of 22,140 and 8,617.
Exercise 61
Add the sum of 2,273, 3,304, 847, and 16 to the difference of 4,365 and 864.
Solution
9,941
Exercise 62
Add the sum of 19,161, 201, 166,127, and 44 to the difference of the sums of 161, 2,455, and 85, and 21, 26, 48, and 187.
Exercise 63
Is the sum of 626 and 1,242 the same as the sum of 1,242 and 626? Justify your claim.







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