Balanced Equations
4 + __ = 5 + 10
11
What is the first step in estimating?
Round!
In the fridge, there are 4 stacks of chocolate puddings, 7 stacks of brownies and 5 stacks of pasta salad. How many stacks of dessert are there?
16
13+25=
38
54-23=
31
14 + 4 = 20 - ___
2
Estimate the difference
25 - 13 =
25 rounds to 30
13 rounds to 10
30 - 10 = 20
Maria has 27 stickers. Her friend gives her 18 more.
How many stickers does Maria have now?
45 stickers
12 + 42 =
54
49 - 15
34
35 - 4 = 30 + ___
1
Estimate the sum
34 + 28 =
34 rounds to 30
28 rounds to 30
30 + 30 = 60
A store had 64 balloons. They sold 29 of them.
How many balloons are left?
35 balloons
42 + 37 =
81
84-39=
45
19 + 18 = ___ + 20
17
Estimate the difference
72 -43=
72 rounds to 70
43 rounds to 40
70 - 40 = 30
The food bank has some volunteers. 34 men and 45 women signed up. How many total volunteers were there?
79
56 + 26 =
82
68 - 29 =
39
40 - ___ = 20 + 20
0
Estimate the sum
68 + 24 =
68 rounds to 70
24 rounds to 20
70 + 20 = 90
There were 42 glasses of juice. The guests at the party spilled 4 glasses of juice and drank 31 glasses of juice. How many glasses were left?
7
71+19=
90
54 - 36 =
18