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Find the Number That Has Been Added

In this worksheet, students work out the number that has been added to another number.

'Find the Number That Has Been Added' worksheet

Key stage:  KS 3

Curriculum topic:  Number

Curriculum subtopic:  Use Relationships Between Operations

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

In this worksheet, we must find the number which has been added.


Example

What needs to be added to change 9.799 to 9.8 ?

 

Answer

We use the inverse of addition (i.e. subtraction) to work this out.  

9.8 - 9.799 = 0.001

What needs to be added to change 7.272 to 7.274 ?

What needs to be added to change 8.031 to 8.035 ?


What needs to be added to change 7.403 to 7.408 ?


What needs to be added to change 8.906 to 8.908 ?


What needs to be added to change 7.68 to 7.681 ?


What needs to be added to change 5.47 to 5.475 ?


What needs to be added to change 2.501 to 2.513 ?

 

What needs to be added to change 6.6 to 6.656 ?

 

What needs to be added to change 0.227 to 0.23 ?

 

What needs to be added to change 4.807 to 4.9 ?

 

  • Question 1

What needs to be added to change 7.272 to 7.274 ?

CORRECT ANSWER
0.002
  • Question 2

What needs to be added to change 8.031 to 8.035 ?


CORRECT ANSWER
0.004
  • Question 3

What needs to be added to change 7.403 to 7.408 ?


CORRECT ANSWER
0.005
  • Question 4

What needs to be added to change 8.906 to 8.908 ?


CORRECT ANSWER
0.002
  • Question 5

What needs to be added to change 7.68 to 7.681 ?


CORRECT ANSWER
0.001
  • Question 6

What needs to be added to change 5.47 to 5.475 ?


CORRECT ANSWER
0.005
  • Question 7

What needs to be added to change 2.501 to 2.513 ?

 

CORRECT ANSWER
0.012
  • Question 8

What needs to be added to change 6.6 to 6.656 ?

 

CORRECT ANSWER
0.056
  • Question 9

What needs to be added to change 0.227 to 0.23 ?

 

CORRECT ANSWER
0.003
  • Question 10

What needs to be added to change 4.807 to 4.9 ?

 

CORRECT ANSWER
0.093
---- OR ----

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