Show:
Addition with no regrouping
Addition with regrouping
Subtraction with no regrouping
Subtraction with regrouping
Rounding to solve problems
100

45+32

77

100

53+48

101

100

76-13

63

100
35-18

17

100

Is 450+136

more than 600 or less than 600

less than 600

200

213+46

259

200

354+46

400

200

88-54

34

200

471-399

72

200

Is 672-400 

more than 300 or less than 300

More than 300

300

324+52

376

300

435+426

861

300

764-300

464

300

500-362

138

300

Is 435+299

more than 700 or less than 700

more than 700

400

621+178

799

400

700+222

922

400

652-141

511

400

705-239

466

400

Is 600-231 

more than 300 or less than 300

more than 300

500

455+340

795

500

458+198

656

500

898-366

532

500

800-264

536

500

Is 467-400 

more than 100 or less than 100

less than 100