Estimate Sums
Estimate the sum to the nearest whole number
8.9 + 4.7
9 + 5 = 14
Estimate the difference to the nearest whole number
8.8 - 3.7
9 - 4 = 5
5.2 + 2.3 =
7.5
8.7 - 2.1 =
6.6
Maya buys a notebook for $3.45 and a pen for $0.95.
How much money does she spend altogether?
3.45 + 0.95 = $4.40
Estimate the sum to the nearest whole number
12.3 + 6.6
12 + 7 = 19
Estimate the difference to the nearest whole number
10.6 - 8.2
11 - 8 = 3
3.45 + 6.58 =
10.03
6.74 - 4.36 =
2.38
A rope is 13.85 m long. Liam cuts off 2.65 m of the rope. How much rope is left?
13.85 - 2.65 = 11.20 m of rope
Estimate the sum to the nearest whole number
2.75 + 3.95
3 + 4 = 7
Estimate the difference to the nearest whole number
2.85 - 2.21
3 - 2 = 1
17.87 + 9.99 =
26.86
11.51 - 6.32 =
5.19
A carton of milk holds 1.50 L and a juice bottle holds 1.25 L. How much liquid is there in total?
1.75 + 0.85 = 2.75L
Estimate the sum to the nearest tenth
5.15 + 7.12
5.2 + 10.1 = 12.3
Estimate the difference to the nearest tenth
6.44 - 5.09
6.4 - 5.1 = 1.3
24.43 + 26.51 =
50.94
13.05 - 12.30 =
0.75
Sarah has $15.00. She spends $6.27 on a book.
How much money does she have left?
15.00 - 6.27 = $9.73
Estimate the sum to the nearest tenth
6.309 + 7.586
6.3 + 7.6 = 13.9
Estimate the difference to the nearest tenth
13.501 - 8.075
13.5 - 8.1 = 5.4
29.015 + 22.011 =
51.026
23.555 - 15.145 =
8.410
A runner jogs 5.45 km in the morning and 2.80 km in the afternoon. Later, she realizes that 1.15 km of the path was downhill and doesn’t count it. What is the total distance she counts?
5.45 + 2.80 - 1.15 = 7.15km