Show:
Addition with regrouping
subtraction without regrouping
subtraction with regrouping
subtraction across zeros
missing addends
100
299 + 234
533
100
55 - 32 =
23
100
507 - 294 =
213
100
405 - 189 =
216
100
55 + ? = 321
266
200
357 +208
565
200
662 - 444 =
218
200
920 - 50 =
870
200
200 - 74 =
126
200
299 + ? = 350
51
300
687 + 678
1,365
300
855 - 805 =
50
300
378 - 259 =
119
300
600 - 186 =
414
300
226 + ? =
406
400
878 + 316 =
1,194
400
399 - 166 =
233
400
517 - 108 =
409
400
602 - 317 =
285
400
35 + ? = 91
56
500
999 + 777 =
1,776
500
500 - 320
180
500
906 - 241 =
665
500
723 - 604 =
119
500
1,030 + ? = 2,632
1,602