Adding
Hundreds + Hundreds
Adding
Thousands + Hundreds
Adding 3 Numbers
Adding 3 Hundreds
Estimating
100

400+400=

800

100

1100+400

1500

100

10+30+20=

60

100

300+500+200

1000

100

Round to the nearest 10 - 364

360

100

120+150=

270

100

2600+300=

2900

100

30+51+22=

103

100

550+250+100=

900

100

Round to the nearest 10 - 528

530

100

170+408=

578

100

5100+325=

5425

100

600+40+40=

680

100

120+370+600=

1090

100

Round to the nearest 10 - 693

690

100

202+646=

848

100

5210+621=

5831

100

500+200+50=

750

100

313+620+250=

1183

100

Round to the nearest 10 - 797

800

100

164+235=

399

100

4527+225=

4752

100

123+50+23=

196

100

333+444+333=

1110

100

Round to the nearest 10 - 898

900