Decimal Multiplication Word Problems

Decimal Multiplication Word Problems
  • Page 1
 1.  
Find the product of 2.2 and 4.2.
a.
92.4
b.
9240
c.
924
d.
9.24


Solution:

2.2 × 4.2
[Write the expression.]



So, the product of 2.2 and 4.2 is 9.24.


Correct answer : (4)
 2.  
Find the product of 6.8 and 5.6.
a.
3.808
b.
38.08
c.
380.8
d.
3808


Solution:

6.8 × 5.6
[Write the expression.]



So, the product of 6.8 and 5.6 is 38.08.


Correct answer : (2)
 3.  
Find the product of 8.6 and 65.
a.
5.59
b.
559
c.
5590
d.
55.9


Solution:

8.6 × 65
[Write the expression.]



So, the product of 8.6 and 65 is 559.


Correct answer : (2)
 4.  
Find the product of 9.1 and 54.
a.
49.14
b.
4914
c.
4.914
d.
491.4


Solution:

9.1 × 54
[Write the expression.]



So, the product of 9.1 and 54 is 491.4.


Correct answer : (4)
 5.  
Multiply 3.2 by 42.
a.
13.44
b.
134.4
c.
12.44
d.
1.344


Solution:

3.2 × 42
[Write the expression.]




Correct answer : (2)
 6.  
Identify a number sentence that describes the model.

a.
0.3 × 0.6
b.
0.03 × 0.06
c.
0.4 × 0.6
d.
0.6 × 0.5


Solution:


0.3 can be shown as


0.6 can be shown as


0.3 × 0.6 can be shown as

So, the number sentence is 0.3 × 0.6.


Correct answer : (1)
 7.  
Identify the model for 0.4 × 0.5.


a.
Model 4
b.
Model 3
c.
Model 2
d.
Model 1


Answer: (d)


Correct answer : (4)
 8.  
Identify a number sentence that describes the model.

a.
0.2 × 0.6
b.
0.4 × 0.6
c.
0.02 × 0.06
d.
0.6 × 0.6


Answer: (a)


Correct answer : (1)
 9.  
Irena makes $7.25 an hour. How much money does she make in 4.8 hours?
a.
$34.80
b.
$36.08
c.
$12.05
d.
$3.48


Solution:

Money that Irena makes in one hour = $7.25


Money that Irena makes in 4.8 hours = 4.8 × 7.25

So, Irena makes $34.80 in 4.8 hours.


Correct answer : (1)
 10.  
Find the product of 1.11 and 1.11.
a.
1.2321
b.
1.3321
c.
1.2421
d.
1.1321


Solution:

1.11 and 1.11
[Original decimals.]

        1.11
     ×   1.11
.....................
            111
       111
+ 111
.....................
    1.2321
.....................

[2 decimal places.]
[2 decimal places.]





[4 decimal places.]

The product of 1.11 and 1.11 is 1.2321.


Correct answer : (1)

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