Name:____________________
Date:_________________
Front-End Estimation
Estimate the sum or difference by using front-end estimation.
1.
2.
78
-54
63
+22
-
+
3
3.
3
4.
93
-11
668
+236
-
+
3
5.
3
6.
423
+277
63
-46
+
-
3
7.
3
8.
575
-285
29
+42
3
9.
+
+
3
+
+
3
10.
781
-247
444
+278
3
12.
11.
36
+26
+
+
63
-17
3
3
www.softschools.com
Name:____________________
Date:_________________
Front-End Estimation
Estimate the sum or difference by using front-end estimation.
1.
2.
78
-54
80
-50
63
+22
30
3.
60
+20
80
4.
93
-11
90
-10
668
+236
80
5.
700
+200
900
6.
423
+277
63
-46
400
+300
700
7.
60
-50
10
8.
575
-285
29
+42
600
-300
300
9.
30
+40
70
10.
781
-247
800
-200
444
+278
600
400
+300
700
12.
11.
36
+26
40
+30
70
63
-17
60
-20
40
www.softschools.com