Show:
Estimation
How far away from 20
How far away from 40
Single column
Two columns
100
Round to the nearest 10 Estimate: What is 32 + 56?
90
100
The number 16, how far away is from 20?
4
100
How far away is the number 31 from 40?
9
100
3+4+7=
14
100
15+34=
49
200
Round to the nearest 10 Estimate: 67 + 29
100
200
The number 12, how far away is from 20?
8
200
How far away is the number 36 from 40?
4
200
2+9+8=
19
200
34 + 25=
59
300
Round to the nearest 10 Estimate: 92 + 68
160
300
The number 14, how far away is from 20?
6
300
How far away is the number 32 from 40?
8
300
8+7+4+3+6=
28
300
23 + 24 + 31=
78
400
Round to the nearest 100 Estimate: 123 + 275
400
400
The number 17, how far away is from 20?
3
400
How far away is the number 34 from 40?
6
400
2+5+8+7+4+3+5=
34
400
37+44+26=
107
500
Round to the nearest 100 Estimate 567 + 402
1000
500
The number 11, how far away is from 20?
9
500
How far is 37 from 100?
63
500
1+7+3+1+9+4+2+6=
33
500
27+19+34+62=
142