Scroll:Rational numbers >> Multiply and divide rational numbers >> saq (4057)


Written Instructions:

For each Multiple Choice Question (MCQ), four options are given. One of them is the correct answer. Make your choice (1,2,3 or 4). Write your answers in the brackets provided..

For each Short Answer Question(SAQ) and Long Answer Question(LAQ), write your answers in the blanks provided.

Leave your answers in the simplest form or correct to two decimal places.



 

1)  

 Multiply. Write your answer as a decimal.

5.1 × -2.2 =


Answer:_______________




2)  

 Multiply. Simplify your answer and write it as a proper fraction or as a whole or mixed number.

-4
2
3
 × 
 
-1
8
 =

   


Answer:_______________




3)  

 Multiply. Write your answer as a decimal.

-5.5 × -2.8 =


Answer:_______________




4)  

 Multiply. Write your answer as a decimal.

1.3 × 6.7 =


Answer:_______________




5)  

Multiply. Simplify your answer and write it as a proper fraction or as a whole or mixed number.

4
4
3
 × 
 
-3
13
 =

   


Answer:_______________




6)  

 Multiply. Write your answer as a decimal.

5.2 × -5.8 =


Answer:_______________




7)  

 Multiply. Simplify your answer and write it as a proper fraction or as a whole or mixed number.

-2
4
3
 × 
 
-3
15
 =

   


Answer:_______________




8)  

 Multiply. Write your answer as a decimal.

-1.6 × -3.5 =


Answer:_______________




9)  

 Multiply. Write your answer as a decimal.

6.9 × 3.8 =


Answer:_______________




10)  

Multiply. Simplify your answer and write it as a proper fraction or as a whole or mixed number.

2
1
2
 × 
 
-4
13
 =

   


Answer:_______________




 

1)  

 Multiply. Write your answer as a decimal.

5.1 × -2.2 = Answer: -11.22


SOLUTION 1 :

Remember:

positive × positive = positive

Count the total number of decimal places in both factors. Move the decimal point one place to the left for each decimal place you counted.

Solve:

5.1

           x    -2.2

-------
-11.22

 

Because positive × negative = negative, the answer is -11.22.



2)  

 Multiply. Simplify your answer and write it as a proper fraction or as a whole or mixed number.

-4
2
3
 × 
 
-1
8
 =

  Answer: 712  


SOLUTION 1 :

Write the mixed number as an improper fraction.

-4
2
3
 × 
 
-1
8
   
 
-14
3
 × 
 
-1
8

Now multiply.

 
-14
3
  ×  
 
-1
8
  =  
 
-14× -1
3 × 8
               
           =  
 
14
24

 = 712

 



3)  

 Multiply. Write your answer as a decimal.

-5.5 × -2.8 = Answer: 15.4


SOLUTION 1 :

Remember:

positive × positive = positive

Count the total number of decimal places in both factors. Move the decimal point one place to the left for each decimal place you counted.

Solve:

-5.5

           x    -2.8

-------
15.4

 

Because negative × negative = positive, the answer is 15.4.



4)  

 Multiply. Write your answer as a decimal.

1.3 × 6.7 = Answer: 8.71


SOLUTION 1 :

Remember:

positive × positive = positive

Count the total number of decimal places in both factors. Move the decimal point one place to the left for each decimal place you counted.

Solve:

1.3

           x    6.7

-------
8.71

 

Because positive × positive = positive, the answer is 8.71.



5)  

Multiply. Simplify your answer and write it as a proper fraction or as a whole or mixed number.

4
4
3
 × 
 
-3
13
 =

  Answer: -1613  


SOLUTION 1 :

Write the mixed number as an improper fraction.

4
4
3
 × 
 
-3
13
   
 
16
3
 × 
 
-3
13

Now multiply.

 
16
3
  ×  
 
-3
13
  =  
 
16× -3
3 × 13
               
           =  
 
-48
39

 = -1613

 



6)  

 Multiply. Write your answer as a decimal.

5.2 × -5.8 = Answer: -30.16


SOLUTION 1 :

Remember:

positive × positive = positive

Count the total number of decimal places in both factors. Move the decimal point one place to the left for each decimal place you counted.

Solve:

5.2

           x    -5.8

-------
-30.16

 

Because positive × negative = negative, the answer is -30.16.



7)  

 Multiply. Simplify your answer and write it as a proper fraction or as a whole or mixed number.

-2
4
3
 × 
 
-3
15
 =

  Answer: 23  


SOLUTION 1 :

Write the mixed number as an improper fraction.

-2
4
3
 × 
 
-3
15
   
 
-10
3
 × 
 
-3
15

Now multiply.

 
-10
3
  ×  
 
-3
15
  =  
 
-10× -3
3 × 15
               
           =  
 
30
45

 = 23

 



8)  

 Multiply. Write your answer as a decimal.

-1.6 × -3.5 = Answer: 5.6


SOLUTION 1 :

Remember:

positive × positive = positive

Count the total number of decimal places in both factors. Move the decimal point one place to the left for each decimal place you counted.

Solve:

-1.6

           x    -3.5

-------
5.6

 

Because negative × negative = positive, the answer is 5.6.



9)  

 Multiply. Write your answer as a decimal.

6.9 × 3.8 = Answer: 26.22


SOLUTION 1 :

Remember:

positive × positive = positive

Count the total number of decimal places in both factors. Move the decimal point one place to the left for each decimal place you counted.

Solve:

6.9

           x    3.8

-------
26.22

 

Because positive × positive = positive, the answer is 26.22.



10)  

Multiply. Simplify your answer and write it as a proper fraction or as a whole or mixed number.

2
1
2
 × 
 
-4
13
 =

  Answer: 10-13  


SOLUTION 1 :

Write the mixed number as an improper fraction.

2
1
2
 × 
 
-4
13
   
 
5
2
 × 
 
-4
13

Now multiply.

 
5
2
  ×  
 
-4
13
  =  
 
5× -4
2 × 13
               
           =  
 
-20
26

 = 10-13