1.
Find the sum.
A.
14
B.
16
C.
18
D.
12
Hint
2.
Marta hiked 6 miles yesterday and 7 miles today. How many miles did she hike during the two days?
A.
12
B.
15
C.
11
D.
13
Hint
3.
Find the sum. Identify the property.
15 + 0 = ___
A.
15; Identity Property of Addition
B.
15; Associative Property of Addition
C.
15; Commutative Property of Addition
D.
0; Identity Property of Addition
Hint
4.
Estimate the sum using compatible numbers.
36 + 45 = ___
A.
50 + 50 = 90
B.
25 + 25 = 50
C.
40 + 50 = 80
D.
40 + 40 = 80
Hint
5.
Suki read 78 pages in her book last week. This week she read 31 pages so far. About how many pages did she read over the last two weeks?
A.
80 + 30 = 110
B.
100 + 30 = 130
C.
80 + 40 = 120
D.
70 + 30 = 100
Hint
6.
Find the sum.
A.
73
B.
13
C.
53
D.
63
Hint
7.
At two movie theaters, 15 children are seeing a Western and 23 are seeing a comedy. How many children are seeing one of these two movies?
A.
48
B.
38
C.
40
D.
45
Hint
8.
Find the sum.
A.
$710
B.
$80
C.
$70
D.
$7
Hint
9.
Find the sum.
19¢ + 29¢ = ___
A.
318¢
B.
38¢
C.
48¢
D.
58¢
Hint
10.
Find the sum.
186 + 354 = ___
A.
430
B.
440
C.
530
D.
540
Hint
11.
Why is it a good idea to check answers for reasonableness?
A.
Using estimation to check your answers gives exact results.
B.
Any mistake can be caught by using estimation to check your answers.
C.
Checking for reasonableness uses the Identity Property.
D.
Many careless mistakes can be caught this way.
Hint
12.
Find the sum mentally.
5 + 7 + 1 + 3
A.
20
B.
15
C.
16
D.
10
Hint