Math 40
Prealgebra
Section 2.2 – HOMEWORK
In Exercises 1-12, use a number line to find the sum.
1.
1    7 
2.
8   6 
3.
4   9 
4.
7  3
5.
5  6
6.
5  5
7.
2   2 
8.
6   9 
9.
73
10.
4   4 
11.
3    5 
12.
1   10 
In Exercises 13-24, use a set model to find the sum.
13.
4  9
14.
6   2 
15.
7   1
16.
3   7 
17.
2  2
18.
9  1
19.
6   5 
20.
7   7 
21.
5   8 
22.
2    3 
23.
92
24.
6   1
In Exercises 25-32, use the rules to find the sum.
25.
6   3 
26.
6  3
27.
15   6 
28.
4   14 
29.
7   17 
30.
3  14
31.
16  20
32.
15   19 
1
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Math 40
Prealgebra
Section 2.2 – HOMEWORK
In Exercises 33-48, use any method to find the sum.
33.
12   12 
34.
12  12
35.
10  18
36.
15  11
37.
13   19 
38.
11   12 
39.
5   10 
40.
5  10
41.
15  15
42.
15  1
43.
16   10 
44.
10   16 
45.
8   7 
46.
6   4 
47.
4  12
48.
1  17
In Exercises 49-60, find the sum.
49.
9  4   9 
50.
8  3  8
51.
13  1   7 
52.
15  2   3
53.
5    6   4   3 
54.
2   5   4   1
55.
7   3   6   2 
56.
8    4   2   5 
57.
8  5    7   6
58.
6  1   9   7
59.
4  3   8   11   12 
60.
4   3  8   11  12
2
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