Show:
Adding With Regrouping
Subtracting with Regrouping
Subtracting Across 0's
Mental math
Adding with 3
100
386 + 457
843
100
813 - 678
135
100
500 - 345
155
100

32+4

36

100

13+24+31

68

200
539 + 287
826
200
615 - 456
159
200
700 - 546
154
200

78+5

83

200

14+42+61

117

300
456 + 367
823
300
568 - 378
190
300
604 - 327
277
300

42+7

49

300

32+15+68

115

400

568+283

851

400
872 - 694
178
400
801 - 289
512
400

87+6

93

400

25+42+61

128

500

398+289

687

500
435 - 256
179
500
405 - 257
148
500

53+9

62

500

14+75+47

136