Unit 1 Review

Rounding

100

Round 56 to the nearest ten. 

60

200

Round 423 to the nearest hundred. 

400

300

Round 357 to the nearest ten. 

360

400

Round 252 to the nearest hundred. 

300

500

Round 275 to the nearest ten. 

280

Addition

100

Find the sum

323+154

477

200

Find the sum

431+384

815

300

Find the sum 

237+443

680

400

Find the sum 

729+195

924

500

Find the sum

 437+492

929

Subtraction

100

Find the difference 

738-315

423

200

Find the difference 

632-481

151

300

Find the difference 

523-246

277

400

Subtract

725-196

529

500

Subtract

802-267

535