Mental Math +/-
Triple Digit Addition
Triple Digit Subtraction
Arrow Way
100

Use mental math to solve. 

60 + 30 = _____

60 + 30 = 90

100

Solve.

256 + 131 = _____

256 + 131 = 387

100

Solve.

593 - 171 = _____

593 - 171 = 422

100

Solve using the arrow way.

389 ⟶+10 _____ ⟶+100 _____

389 ⟶+10  399  ⟶+100  499

200

Use mental math to solve.

80 - 50 = _____

80 - 50 = 30

200

Solve.

280 + 320 = _____

280 + 320 = 600

200

Solve.

650 - 280 = _____

650 - 280 = 370

200

Solve using the arrow way.

187 ⟶-10 _____ ⟶-100 _____

187 ⟶-10  177 ⟶-100 77

300

Use mental math to solve.

120 + 60 = _____

120 + 60 = 180

300

Solve.

280 + 250 = _____

280 + 250 = 530

300

Solve.

740 - 270 = _____

740 - 270 = 470

300

Solve using the arrow way.

391 ⟶-100 _____ ⟶-10 _____

391 ⟶-100  291 ⟶-10  281

400

Use mental math to solve. 

170 - 50 = _____

170 - 50 = 120

400

Solve.

456 + 378 = _____

456 + 378 = 834

400

Solve.

372 - 199 = _____

372 - 199 = 173

400

Solve using the arrow way.

512 ⟶-10 __ ⟶-10 __ ⟶+100 __ ⟶+100 __⟶+10 __

512 ⟶-10 502 ⟶-10 492 ⟶+100 592 ⟶+100 692 ⟶+10 702

500

Use mental math to solve.

140 + 150 = _____

140 + 150 = 290

500

Solve. 

187 + 567 = _____

187 + 567 = 754

500

Solve.

442 - 298 = _____

442 - 298 = 144

500

Solve using the arrow way.

609 ⟶-10 _____ ⟶-__ 499 ⟶+10 _____ ⟶+__ 519

609 ⟶-10  599 ⟶-100  499 ⟶+10  509 ⟶+10 519

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