Scroll:Operations with decimals >> Add, subtract, multiply and divide decimals: 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 Tulasi takes 8.5 minutes to make a sandwich. How long does it take her to make 3 sandwiches

minutes


Answer:_______________




2)  

Each piece of cardboard is 0.5 centimetres thick. If Haritha stacks 6 pieces of cardboard on top of one another, how thick will the stack be

centimetres


Answer:_______________




3)  

Murugan placed 3 weights on a scale during science class. If each weight weighed 6.7 grams, what did the scale read

grams


Answer:_______________




4)  

Parveen bought plastic tubes that are each 0.9 metres long. If Parveen makes a line of 4 tubes by placing them end-to-end, how long will it be

metres


Answer:_______________




5)  

Selvanayaki bikes 0.8 kilometres each school day. In total, how far will Steven bike over 7 school days

kilometres


Answer:_______________




6)  

A sandwich shop employee Parveen takes 3.8 minutes to make a sandwich. How long does it take her to make 4 sandwiches

minutes


Answer:_______________




7)  

Each piece of cardboard is 0.7 centimetres thick. If Poovazhagi stacks 4 pieces of cardboard on top of one another, how thick will the stack be

centimetres


Answer:_______________




8)  

Sriram placed 3 weights on a scale during science class. If each weight weighed 7.7 grams, what did the scale read

grams


Answer:_______________




9)  

Mithra bought plastic tubes that are each 0.8 metres long. If Mithra makes a line of 4 tubes by placing them end-to-end, how long will it be

metres


Answer:_______________




10)  

Amutha bikes 0.9 kilometres each school day. In total, how far will Steven bike over 8 school days

kilometres


Answer:_______________




 

1)  

A sandwich shop employee Tulasi takes 8.5 minutes to make a sandwich. How long does it take her to make 3 sandwiches

Answer: 25.5 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.

 

8.5
x     3
-----------------
255

Count the number of decimal places in the factors. There is 1 decimal place in 8.5 Move the decimal point 1 place to the left in the answer.

            255. → 25.5

It takes Tulasi 25.5 minutes to make 3 sandwiches.
 



2)  

Each piece of cardboard is 0.5 centimetres thick. If Haritha stacks 6 pieces of cardboard on top of one another, how thick will the stack be

Answer: 3 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.

0.5
x     6
-----------------
30

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.

            30. → 3

The stack will be 3 centimetres thick.
 



3)  

Murugan placed 3 weights on a scale during science class. If each weight weighed 6.7 grams, what did the scale read

Answer: 20.1 grams


SOLUTION 1 :

Solve:

 Multiply as you would multiply whole numbers.

 

6.7
x     3
-----------------
201

Count the number of decimal places in the factors. There is 1 decimal place in 6.7 Move the decimal point 1 place to the left in the answer.

            201. → 20.1

ans =  20.1


 



4)  

Parveen bought plastic tubes that are each 0.9 metres long. If Parveen makes a line of 4 tubes by placing them end-to-end, how long will it be

Answer: 3.6 metres


SOLUTION 1 :

Solve:

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

Multiply as you would multiply whole numbers.

0.9
x     4
-----------------
36

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.

            36. → 3.6

The line of plastic tubes will be 3.6 metres long.
 



5)  

Selvanayaki bikes 0.8 kilometres each school day. In total, how far will Steven bike over 7 school days

Answer: 5.6 kilometres


SOLUTION 1 :

Solve:

Multiply as you would multiply whole numbers.

0.8
x     7
-----------------
56

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.

            56. → 5.6

5.6
 



6)  

A sandwich shop employee Parveen takes 3.8 minutes to make a sandwich. How long does it take her to make 4 sandwiches

Answer: 15.2 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.

 

3.8
x     4
-----------------
152

Count the number of decimal places in the factors. There is 1 decimal place in 3.8 Move the decimal point 1 place to the left in the answer.

            152. → 15.2

It takes Parveen 15.2 minutes to make 4 sandwiches.
 



7)  

Each piece of cardboard is 0.7 centimetres thick. If Poovazhagi stacks 4 pieces of cardboard on top of one another, how thick will the stack be

Answer: 2.8 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.

0.7
x     4
-----------------
28

Count the number of decimal places in the factors. There is 1 decimal place in 0.7 Move the decimal point 1 place to the left in the answer.

            28. → 2.8

The stack will be 2.8 centimetres thick.
 



8)  

Sriram placed 3 weights on a scale during science class. If each weight weighed 7.7 grams, what did the scale read

Answer: 23.1 grams


SOLUTION 1 :

Solve:

 Multiply as you would multiply whole numbers.

 

7.7
x     3
-----------------
231

Count the number of decimal places in the factors. There is 1 decimal place in 7.7 Move the decimal point 1 place to the left in the answer.

            231. → 23.1

ans =  23.1


 



9)  

Mithra bought plastic tubes that are each 0.8 metres long. If Mithra makes a line of 4 tubes by placing them end-to-end, how long will it be

Answer: 3.2 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     4
-----------------
32

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.

            32. → 3.2

The line of plastic tubes will be 3.2 metres long.
 



10)  

Amutha bikes 0.9 kilometres each school day. In total, how far will Steven bike over 8 school days

Answer: 7.2 kilometres


SOLUTION 1 :

Solve:

Multiply as you would multiply whole numbers.

0.9
x     8
-----------------
72

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.

            72. → 7.2

7.2