Chapter 3 test

Estimate Differences

100

Round to the nearest ten.

28-12

20

200

Round to the nearest ten.

492-121

370

300

Round to the nearest hundred.

654-382

300

400

DAILY DOUBLE

Estimate using front-end estimation.

870-129

700

500

Estimate using front-end estimation.

419-199

300

Subtract 3-digit numbers/Check your work

100

Align and add. Check your work.

474+123

597

200

DAILY DOUBLE

Align and subtract. Check your work.

973-261

712

300

Align and subtract. Check your work.

947-837

110

400

Align and subtract. Check your work.

559-422

137

500

Align and subtract. Check your work.

871-170

701

Subtract with partial differences

100

440-202

440-200=

240-0=

240-2=

240

240

238

200

Find 979-686

979-600=

379-70=

309-10=

299-6=

379

309

299

293

300

Subtract using partial differences.

872-419

453

400

Subtract using partial differences.

977-279

698

500

Subtract using partial differences.

532-169

363

Subtract Across Zeros

100

350-169

181

200

400-287

113

300

800-152

648

400

500-219

281

500

600-336

264

Random

100

Estimate by rounding to the nearest ten and hundred. 

733-195

530, 700

200

Subtract and check. 

250-142

108

300

When is Ms. Pippin's birthday? (month)

February

400

Align and subtract.

700-256

444

500

Subtract.

300-189

111