Show:
Addition With Regrouping
Subtraction With Regrouping
4-Digit Addition With Regrouping
4-Digit Subtraction With Regrouping
Surprise!
100

493 + 27=

520

100
97-18=
79
100

1,296+1,370=

2,666

100

2,503-1,363=

1,140

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

354 + 76=

430

200

183-47=

136

200

2,511+5,396=

7,907

200

5,678-3,296=

2,382

200
Estimate-Round to the nearest ten 579+219=
800
300

2,228+96=

2,324

300

2,392-463=

1,929

300
393+371=
764
300

9,843-1,652=

8,191

300
Estimate-Round to the nearest hundred 456+328=
800
400

1,247+1,356=

2,603

400

6,273-1,356=

4,917

400

7,674+2,190=

9,864

400

9,328-6,258=

3,070

400
Estimate-Round to the nearest hundred 765-248=
600
500

9,039+1,368=

10,407

500

4,364-1,338=

3,026

500

1,754+9,197=

10,951

500

5,789-5,198=

591

500
Estimate-Round to the nearest hundred 500-245=
300