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Addition and Subtraction of Decimals Worksheet

Addition and Subtraction of Decimals Worksheet
  • Page 1
 1.  
Sandra bought an envelope for $0.35 and a greeting card for $9.50. Which operation could be used to find the money spent by Sandra on the envelope and the greeting card?
a.
addition
b.
division
c.
multiplication
d.
subtraction


Solution:

Money spent by Ursula on envelope and greeting card = cost of envelope + cost of greeting card

So, the money spent by Ursula on envelope and greeting card can be found using the operation addition.


Correct answer : (1)
 2.  
Frank walked 3.1 miles in the morning and 2.8 miles in the evening. How many miles did he walk in all?
a.
5.9 miles
b.
4.9 miles
c.
3.8 miles
d.
5.5 miles


Solution:

Number of miles Frank walked = Number of miles he walked in the morning + Number of miles he walked in the evening

= 3.1 + 2.8 = 5.9
[Substitute the values and add.]

So, Frank walked 5.9 miles.


Correct answer : (1)
 3.  
Charlie went shopping with $55.75. He spent $28.50. How much money was he left with?
a.
$17.25
b.
$12.25
c.
$27.35
d.
$27.25


Solution:

The amount that Charlie was left with = the amount he took for shopping - the amount he spent

= $55.75 - $28.50 = $27.25
[Susbtitute the values and subtract.]

So, the money left with Charlie was $27.25.


Correct answer : (4)
 4.  
Sheela has $m. She bought books for $b, ate an icecream for $5.75 and her mother gave $7.50. Which equation can be used to find the amount, a, she is left with?
a.
a = m - (b - 5.75) + 7.50
b.
a = m - (b + 5.75) + 7.50
c.
a = m + (b + 5.75) + 7.50
d.
a = m - (b + 5.75) - 7.50


Solution:

The money Sheela has = $m

The money spent on books = $b

The money spent on icecream = $5.75

The money given by her mother = $7.50

The amount left with Sheela = money she has - (money spent on books + money spent on icecream) + money given by her mother

a = m - (b + 5.75) + 7.50

So, the equation that can be used to find the amount left with Sheela is a = m - (b + 5.75) + 7.50.


Correct answer : (2)
 5.  
John walked 1.5 miles on Monday, 1.7 miles on Tuesday, 1.3 miles on Wednesday. How many miles did he walk in all?
a.
5.3 miles
b.
3.5 miles
c.
6.5 miles
d.
4.5 miles


Solution:

Total number of miles John walked on Monday + Total number of miles John walked on Tuesday + Total number of miles John walked on Wednesday

= 1.5 + 1.7 + 1.3

= 4.5 miles.


Correct answer : (4)
 6.  
Nick bought a shirt for $14.66. He gave the clerk $20. How much change should he get?
a.
$5.34
b.
$5
c.
$34.66
d.
$6.34


Solution:

Change Nick gets = amount given to clerk - cost of the shirt

= 20 - 14.66

So, Nick gets a change of $5.34.


Correct answer : (1)
 7.  
When Johnny read the thermometer this morning, it was 53° F. At 5 p.m., the temperature was 98.5°F. What was the increase in the temperature?
a.
45.5°
b.
35.5°
c.
55.5°
d.
151.5°


Solution:

To find increase in temperature, subtract the morning temperature from the evening temperature.

98.5°F - 53°F = 45.5°

So, the temperature increased by 45.5°.


Correct answer : (1)
 8.  
John bought a pizza for $10.50. He paid $15. How much change should he get?
a.
$4.45
b.
$5
c.
$6.50
d.
$4.50


Answer: (d)


Correct answer : (4)
 9.  
Find the sum statement for the model.


a.
0.12 + 0.38
b.
0.38 + 0.12
c.
0.11 + 0.15
d.
0.21 + 0.13


Solution:

The decimals represented by the two models are 0.12, 0.38

So, the sum statement represented by the two models = 0.12 + 0.38


Correct answer : (1)
 10.  
Pick the appropriate sum statement that represents the model shown.


a.
0.4 + 0.3
b.
0.4 + 0.03
c.
0.04 + 0.03
d.
0.04 + 0.3


Solution:

The two models represents 0.4 and 0.3.

The combined model represents 0.4 + 0.3.


Correct answer : (1)

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