Show:
Adding
Hundreds + Hundreds
Adding
Thousands + Hundreds
Adding 3 Numbers
Adding 3 Hundreds
Estimating
100
100+700=
800
100
1000+500
1500
100
15+30+20=
65
100
100+200+300
600
100
Round to the nearest 100 361+226=
400+200=600
200
220+350=
570
200
2500+300=
2800
200
26+51+22=
99
200
500+250+100=
850
200
Round to the nearest 10 428+31=
430+30=460
300
170+428=
598
300
3100+325=
3425
300
300+20+30=
350
300
120+370+600=
1090
300
Round to the nearest 10 683+312=
680+310=990
400
242+626=
868
400
5210+411=
5621
400
300+100+50=
450
400
313+620+250=
1183
400
Round to the nearest 10 727+344=
730+340=1070
500
364+235=
599
500
4632+257=
4889
500
132+54+23=
209
500
333+444+333=
1221
500
Round to the nearest 10 398+602=
400+600=1000