Grade 4
Mathematics
Unit: 06
Fraction Sum/Difference Estimation Evaluation KEY
Read and complete the table below for each problem situation.
(1)
3
3
hours one day and 2 hours the next day. Estimate the total number
4
4
of hours he works on both days combined.
Ryan works 1
Mixed Numbers Used
1
3
4
+
2
3
4
Estimate
2 + 3 = 5 hours
Explain your estimate: Answers may vary, but could include using a number line or
1
finding how close or far away each fraction in the mixed number was from
.
2
(2)
5
7
years experience as a musician. Lawana has 5 years experience
8
8
as a musician. About how many more years experience does Lawana have than
Fernando?
Fernando has 4
Mixed Numbers Used
5
7
8
4
5
8
Estimate
6  5 = 1 year
Explain your estimate: Answers may vary, but could include using a number line or
1
finding how close or far away each fraction in the mixed number was from
.
2
(3)
3
The length of a glass covering for a painting is 14 inches long, and the length of the
5
1
painting is 11 inches long. About how much longer is the glass covering than the
5
painting?
Mixed Numbers Used
14
3
5
11
1
5
Estimate
15  11 = 4 inches
Explain your estimate: Answers may vary, but could include using a number line or
1
finding how close or far away each fraction in the mixed number was from
.
2
Grade 4
Mathematics
Unit: 06
Fraction Sum/Difference Estimation Evaluation KEY
(4)
8
7
foot long submarine sandwich and a 2
foot long relish tray
12
12
end-to-end on a picnic table. About how long does the picnic table need to be for these
items to fit?
A caterer put a 6
Mixed Numbers Used
6
8
+
12
2
Estimate
7
12
7 + 3 = 10 foot long
Explain your estimate: Answers may vary, but could include using a number line or
1
finding how close or far away each fraction in the mixed number was from
.
2
(5)
9
Carrie is making cookies for the school bake sale. If she uses 1
pounds of flour per
16
batch, about how much flour will she need if she makes 3 batches?
Mixed Numbers Used
1
9
+
16
1
9
+
16
1
Estimate
9
16
2 + 2 + 2 = 6 pounds
Explain your estimate: Answers may vary, but could include using a number line or
1
finding how close or far away each fraction in the mixed number was from
.
2
(6)
Jerry is building a border around his patio shown below. About how much border
should he buy to make sure he has enough?
8
1 yd
8
6
10
Mixed Numbers Used
10
7
8
+
8
1
8
+
67
8
7
yd
8
7
yd
8
Estimate
11 + 8 + 7 = 26 yards
Explain your estimate: Answers may vary, but could include using a number line or
1
finding how close or far away each fraction in the mixed number was from
.
2