Show:
Adding without regrouping
Adding with regrouping
Subtracting without regrouping
Subtracting with regrouping
100

524+223=

747

100

323+518=

841


100

749-448=

301

100

348-139=

209

200

832+123=

955

200

505+109=

614

200

969-839=

130

200

720-312=

408

300

449+430=

879

300

497+256=

753

300

894-621=

273

300

239-192=

47

400

457+432=

889

400

996+978=

1974

400

978-766=

212

400

851-408=

443

500

655+334=

989

500

596+928=

1524

500

979-166=

813

500

550-290=

260