Show:
Addition With Regrouping 1
Subtraction With borrowing 1
Addition With Regrouping 2
Subtraction With borrowing 2
Surprise!
100

293 + 127=

420

100

697-28=

669

100
296+370=
666
100
503-363=
140
100

349-156=

193

200

554 + 376=

930

200

183-47=

136

200
511+396=
907
200
678-296=
382
200

579+219=

798

300

728+96=

824

300

992-363=

629

300
393+371=
764
300
843-652=
191
300

456+328=

784

400

347+56=

403

400

473-356=

117

400
674+190=
864
400
328-258=
70
400

765-248=

517

500

611+299=

910

500

864-738=

126

500
754+197=
951
500
789-198=
591
500

500-245=

255