Scroll:Operations with decimals >> Multiply decimals and whole numbers: word problems >> saq (3920)


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)  

A sandwich shop employee Chithra takes 4.7 minutes to make a sandwich. How long does it take her to make 4 sandwiches

minutes


Answer:_______________




2)  

Poongodi bikes 0.8 kilometres each school day. In total, how far will Steven bike over 5 school days

kilometres


Answer:_______________




3)  

Anand placed 4 weights on a scale during science class. If each weight weighed 3.5 grams, what did the scale read

grams


Answer:_______________




4)  

Each piece of cardboard is 0.9 centimetres thick. If Swathi stacks 5 pieces of cardboard on top of one another, how thick will the stack be

centimetres


Answer:_______________




5)  

Chellamal bought plastic tubes that are each 0.5 metres long. If Chellamal makes a line of 8 tubes by placing them end-to-end, how long will it be

metres


Answer:_______________




6)  

A sandwich shop employee Thamarai takes 9.6 minutes to make a sandwich. How long does it take her to make 5 sandwiches

minutes


Answer:_______________




7)  

Ovini bikes 0.5 kilometres each school day. In total, how far will Steven bike over 5 school days

kilometres


Answer:_______________




8)  

Raj placed 4 weights on a scale during science class. If each weight weighed 3.5 grams, what did the scale read

grams


Answer:_______________




9)  

Each piece of cardboard is 0.8 centimetres thick. If Ovini stacks 5 pieces of cardboard on top of one another, how thick will the stack be

centimetres


Answer:_______________




10)  

Kumutha bought plastic tubes that are each 0.8 metres long. If Kumutha makes a line of 8 tubes by placing them end-to-end, how long will it be

metres


Answer:_______________




 

1)  

A sandwich shop employee Chithra takes 4.7 minutes to make a sandwich. How long does it take her to make 4 sandwiches

Answer: 18.8 minutes


SOLUTION 1 :

Solve:

 

Multiply the time it takes to make a sandwich by the number of sandwiches.

 

Multiply as you would multiply whole numbers.

 

4.7
x     4
-----------------
188

Count the number of decimal places in the factors. There is 1 decimal place in 4.7 Move the decimal point 1 place to the left in the answer.

            188. → 18.8

It takes Chithra 18.8 minutes to make 4 sandwiches.
 



2)  

Poongodi bikes 0.8 kilometres each school day. In total, how far will Steven bike over 5 school days

Answer: 4 kilometres


SOLUTION 1 :

Solve:

Multiply as you would multiply whole numbers.

0.8
x     5
-----------------
40

Count the number of decimal places in the factors. There is 1 decimal place in 0.8 Move the decimal point 1 place to the left in the answer.

            40. → 4

4
 



3)  

Anand placed 4 weights on a scale during science class. If each weight weighed 3.5 grams, what did the scale read

Answer: 14 grams


SOLUTION 1 :

Solve:

 Multiply as you would multiply whole numbers.

 

3.5
x     4
-----------------
140

Count the number of decimal places in the factors. There is 1 decimal place in 3.5 Move the decimal point 1 place to the left in the answer.

            140. → 14

ans =  14


 



4)  

Each piece of cardboard is 0.9 centimetres thick. If Swathi stacks 5 pieces of cardboard on top of one another, how thick will the stack be

Answer: 4.5 centimetres


SOLUTION 1 :

Solve:

Multiply the thickness of each piece of cardboard by the number of pieces in the stack

Multiply as you would multiply whole numbers.

0.9
x     5
-----------------
45

Count the number of decimal places in the factors. There is 1 decimal place in 0.9 Move the decimal point 1 place to the left in the answer.

            45. → 4.5

The stack will be 4.5 centimetres thick.
 



5)  

Chellamal bought plastic tubes that are each 0.5 metres long. If Chellamal makes a line of 8 tubes by placing them end-to-end, how long will it be

Answer: 4 metres


SOLUTION 1 :

Solve:

Multiply the length of each plastic tube by the number of tubes.

Multiply as you would multiply whole numbers.

0.5
x     8
-----------------
40

Count the number of decimal places in the factors. There is 1 decimal place in 0.5 Move the decimal point 1 place to the left in the answer.

            40. → 4

The line of plastic tubes will be 4 metres long.
 



6)  

A sandwich shop employee Thamarai takes 9.6 minutes to make a sandwich. How long does it take her to make 5 sandwiches

Answer: 48 minutes


SOLUTION 1 :

Solve:

 

Multiply the time it takes to make a sandwich by the number of sandwiches.

 

Multiply as you would multiply whole numbers.

 

9.6
x     5
-----------------
480

Count the number of decimal places in the factors. There is 1 decimal place in 9.6 Move the decimal point 1 place to the left in the answer.

            480. → 48

It takes Thamarai 48 minutes to make 5 sandwiches.
 



7)  

Ovini bikes 0.5 kilometres each school day. In total, how far will Steven bike over 5 school days

Answer: 2.5 kilometres


SOLUTION 1 :

Solve:

Multiply as you would multiply whole numbers.

0.5
x     5
-----------------
25

Count the number of decimal places in the factors. There is 1 decimal place in 0.5 Move the decimal point 1 place to the left in the answer.

            25. → 2.5

2.5
 



8)  

Raj placed 4 weights on a scale during science class. If each weight weighed 3.5 grams, what did the scale read

Answer: 14 grams


SOLUTION 1 :

Solve:

 Multiply as you would multiply whole numbers.

 

3.5
x     4
-----------------
140

Count the number of decimal places in the factors. There is 1 decimal place in 3.5 Move the decimal point 1 place to the left in the answer.

            140. → 14

ans =  14


 



9)  

Each piece of cardboard is 0.8 centimetres thick. If Ovini stacks 5 pieces of cardboard on top of one another, how thick will the stack be

Answer: 4 centimetres


SOLUTION 1 :

Solve:

Multiply the thickness of each piece of cardboard by the number of pieces in the stack

Multiply as you would multiply whole numbers.

0.8
x     5
-----------------
40

Count the number of decimal places in the factors. There is 1 decimal place in 0.8 Move the decimal point 1 place to the left in the answer.

            40. → 4

The stack will be 4 centimetres thick.
 



10)  

Kumutha bought plastic tubes that are each 0.8 metres long. If Kumutha makes a line of 8 tubes by placing them end-to-end, how long will it be

Answer: 6.4 metres


SOLUTION 1 :

Solve:

Multiply the length of each plastic tube by the number of tubes.

Multiply as you would multiply whole numbers.

0.8
x     8
-----------------
64

Count the number of decimal places in the factors. There is 1 decimal place in 0.8 Move the decimal point 1 place to the left in the answer.

            64. → 6.4

The line of plastic tubes will be 6.4 metres long.