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Adding and Subtracting Rational Numbers Worksheet

Adding and Subtracting Rational Numbers Worksheet
  • Page 1
 1.  
Find the sum.
(- 4 9) + (- 5 9) + 4 9
a.
- 1 5
b.
- 5 9
c.
- 10 11
d.
- 6 7


Answer: (b)


Correct answer : (2)
 2.  
Find the quotient.
- 16 ÷ (- 13 5)
a.
10
b.
- 10
c.
15
d.
20


Answer: (a)


Correct answer : (1)
 3.  
Find the quotient.
11 5 ÷ (- 14 5)
a.
- 2 5
b.
2 3
c.
- 2 3
d.
2 5


Answer: (c)


Correct answer : (3)
 4.  
Find the product.
(- 31 4) and (- 37 8)
a.
403 37
b.
403 32
c.
403 64
d.
403 42


Answer: (b)


Correct answer : (2)
 5.  
Find the product.
64 5 and 78 9
a.
2414 45
b.
2414 135
c.
1157 45
d.
2354 45


Answer: (a)


Correct answer : (1)
 6.  
Evaluate the expression.
55 16 - (- 1 16) - 5 16
a.
51 16
b.
51 8
c.
5
d.
413 17


Answer: (a)


Correct answer : (1)
 7.  
Find the sum.
11 5 + 14 5 + 31 5
a.
62 5
b.
61 5
c.
51 6
d.
6


Answer: (b)


Correct answer : (2)
 8.  
Add:
- 0.9 + 14 + 0.9
a.
14
b.
14.9
c.
13.1
d.
15.8


Answer: (a)


Correct answer : (1)
 9.  
Find the number that makes the number sentence true.
3.3 + 5 = ?
a.
2.3
b.
8
c.
3.8
d.
8.3


Solution:

3.3 + 5

= ( 3.0 + 0.3 ) + 5.0
[3.3 can be written as 3.0 + 0.3]

= ( 3.0 + 5.0 ) + 0.3
[By associative property.]

= 8.0 + 0.3

= 8.3


Correct answer : (4)
 10.  
Which of the following numbers makes the number sentence true?
1.5 - 0.4 = ?
a.
0.46
b.
1.46
c.
0.1
d.
1.1


Solution:

1.5 - 0.4

= ( 1.0 + 0.5 ) - 0.4
[1.5 can be written as 1.0 + 0.5]

= 1.0 + 0.5 - 0.4

= 1.0 + 0.1

= 1.1


Correct answer : (4)

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