- a. Is the sum of two positive integers always
positive?
b. Is the sum of two negative integers always
negative?
c. Is the sum of a positive integer and a negative
integer always positive?
d. Is the sum of a positive integer and a negative
integer always negative? - Complete the table by finding the additive inverse,
opposite, and absolute value of the given numbers.
35. 36.
37. 38.
39. 40.
41. 42.
Evaluate each expression.See Examples 4 and 5.
43.
44.
45.
46.Evaluate each expression.See Example 6.
47.
48.
49.
50.Evaluate each expression.See Example 7.
51.
52.
53.
54.TRY IT YOURSELF
Add.
- Find the sum of , , and.
- Find the sum of , , and.
- What is 25 more than?
- What is 31 more than 65?
45
8 [2,701(4,089)]
2 [789(9,135)]
11 12 13
6 7 8
9,750(780)2,345
675 (456) 99
( 12 6)( 6 8)
( 4 8)( 11 4)
[5(8)][9(15)]
[6(4)][8(11)]
5 4 (6)(4)(5)
9 1 (2)(1) 9
2 ( 10 8) ( 9 12)(4)
2 (2) 10 10
7 9 3 6
435 (127) 346 (273)
24 (15) 4 14
7 0 0 (15)
2 6 (1) 4 (3)(2)
14 (30) 14 (9) 9
10 (1) 10 (6) 1
41 (1) 9 1 (41)
23 (5) 3 5 (23)
( 32 13)[5(14)]
( 1 34)[16(8)]
[9(10)]( 7 9)
[ 3 (4)]( 5 2)
8 (5)(10) 6
6 (4)(13) 7
3 7 (4) 1
9 (3) 5 (4)
339 279 704 649
479 (122) 589 (242)
71 (23) 75 (56)
20 (42) 18 10
2.2 Adding Integers 153Additive Absolute
Number inverse Opposite value
190 2- a. What is the sum of an integer and its additive
inverse?
b. What is the sum of an integer and its opposite? - a. What number must be added to to obtain 0?
b. What number must be added to 8 to obtain 0?NOTATIONComplete each solution to evaluate the expression.
GUIDED PRACTICE
Add.See Example 1.
Add.See Examples 2 and 3.
- 7 (6) 34. 4 (2)