Estimating Addition
24 + 13 (rounding to nearest tens)
20 + 10
25 + 10
35
36 - 14 (rounding to nearest tens)
40 - 10
19 + 32 (rounding to nearest tens)
20 + 30
26 + 31
57
87 - 44 (rounding to nearest tens)
90 - 40
41 - 28
13
150 + 87 (rounding to nearest hundreds)
200 + 100
127 + 94
536 - 98 (rounding to nearest hundreds)
500 - 100
245 - 235
10
822 + 637 (rounding nearest hundreds)
800 + 600
257 + 731
988
655 - 299 (rounding to nearest hundereds)
700 - 300
956 - 724
232
1629 + 7347 (rounding to nearest thousands)
2000 + 7000
1358 + 6322
7680
7809 - 4737 (rounding to nearest thousands)
8000 - 5000
6339 - 5796
543
7546 + 9743
17289