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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

234 + _______ = 300

66

200

284 + 131

415

200

451 - 236

215

200

250 + _____ = 500

250

200

17 + 24 + 3 + 16

60

200

500 - 125

375

300

428 + 247

675

300

838 - 251

587

300

600 + ____ = 1,000

400

300

27 + 5 + 25 + 31

88

300

600 - 99

501

400

368 + 142

510

400

624 - 256

368

400

510 + ______ = 1,000

490

400

46 + 21 + 35 + 12 

114

400

789 + _____ = 1,000

211

500

287 + 353

640

500

821 - 246

575

500

352 + ______ = 1,000

648

500

16 + 23 + 46 + 9

94

500

923 - 95

828