Math Review

Comparing Numbers

100

189 __ 639 

189 < 639

200

147 __ 47

147 > 47

300

972 __ 972

972 = 972

400

579 __ 571

579 > 571

500

691__619

691 > 619

Estimating

100

13+18=

13 + 18=31

10 + 20= 30

200

67+82=

67+82= 149

70+80=150

300

245 + 587

245+587=832

200+600=800

400

724+212

724+212+936

700+200=900

500

107+863=

107+763= 870

100+800=900

Subtraction w/ Checking

100

587-25= 

587-25= 562

562+25=587

200

534-216

534-216=318

318+216=534

300

752-341

752-341=411

411+341=752

400

632-416

632-416=216

216+416=632

500

652-264

652-264=388

388+264=652

Addition w/ Carrying

100

32+49

32+49=81

200

88+87

88+87=175

300

526+167

526+167=693

400

277+254

277+254=531

500

167+456

167+456=623

Ordering Numbers

100

27,18,39,13

13,18,27,39

200

78,91,46,81

46,78,81,93

300

180,164,174,168

164,168,174,180

400

697,285,302,158

158,285,302,697

500

534,435,536,625

435,534,536,625