Show:
Addition (no crossing)
Subtraction (no crossing)
Addition (crossing 10)
Subtraction (crossing 10)
Add & Subtract Hundreds
100

12 + 4

16
100

17 - 3

14

100

15 + 7

22

100

20 - 5

15

100

572 + ___ = 872

300

200

22 + 10

32

200

27 - 11

16

200

26 + 38

64

200

36 - 18

18

200

648 = 148 + ___

500

300

146 + 31

177

300

158 - 32

126

300

131 + 29

160

300

158 - 19

139

300

650 - 200 

450

400

258 + 31

289

400
359 - 122

237

400

258 + 127

385

400

244 - 138

106

400

789 + ___ = 989

200

500
503 +482

985

500

806 - 201

605

500

259 + 413

672

500

407 - 28

379

500

300 = ___ - 600

900