Show:
2-Digit Addition
3-Digit Addition with Regrouping
2-Digit Subtraction
3-Digit Subtraction with Regrouping
Estimation
100

63 + 24=

87

100

293+370=

663

100

98-18=

70

100
503-363=
140
100
Estimate-Round to the nearest ten 349-156=
190
200

54 + 45=

99

200
511+396=
907
200

88-43=

45
200
678-296=
382
200
Estimate-Round to the nearest ten 579+219=
800
300

38+41=

79

300
393+371=
764
300

93-61=

32

300
843-652=
191
300
Estimate-Round to the nearest hundred 456+328=
800
400
47+56=
103
400
674+190=
864
400
73-56=
17
400
328-258=
70
400
Estimate-Round to the nearest hundred 765-248=
600
500
39+68=
107
500
754+197=
951
500
64-38=
26
500
789-198=
591
500
Estimate-Round to the nearest hundred 500-245=
300