Show:
Addition
Subtract ion
Big numbers
Many addends
Equations
100

235 + 323

558

100

875 - 324

551

100

100 - 40

60

100

20 + 5 + 10 + 5

40

100

Solve using equations

255 + _______ = 300

45

200

284 + 131

415

200

451 - 236

215

200

250 + _____ = 500

250

200

17 + 24 + 3 + 16

60

200

300 - 125

175

300

305 + 248

553

300

838 - 251

587

300

400 + ____ = 1,000

600

300

27 + 5 + 25 + 31

88

300

600 - 99

501

400

428 + 238

666

400

624 - 256

368

400

480 + ______ = 1,000

520

400

46 + 21 + 35 + 12 

114

400

723 + _____ = 1,000

277

500

395 + 248

643

500

935 - 467

468

500

420 + ______ = 1,000

580

500

23 + 45 + 21 + 5

94

500

850 - 95

755