The smart way to improve grades

Comprehensive & curriculum aligned

Affordable pricing from £10/month

Add and Subtract Numbers Mentally

In this worksheet, students practise adding and subtracting numbers mentally.

'Add and Subtract Numbers Mentally' worksheet

Key stage:  KS 2

Curriculum topic:  Number: Addition, Subtraction, Multiplication and Division

Curriculum subtopic:  Perform Mental Calculations

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

In this worksheet, add and subtract mentally.

Sometimes it is quicker to use little number tricks.

 

Example1

64 + 46 =
110 

 

60 + 40 = 100

4 + 6 = 10

 

Example2

26 − 17 =
 9

 

26 - 20 = 6

6 + 3 = 9

Work out the following mentally.

74 + 19 =
 

Work out the following mentally.

69 + 97 =
 

Work out the following mentally.

997 + 17 =
 

Work out the following mentally.

172 + 49 =
 

Work out the following mentally.

80 + 11 =
 

Work out the following mentally.

31 − 18 =
 

Work out the following mentally.

75 − 45 =
 

Work out the following mentally.

293 − 67 =
 

Work out the following mentally.

61 − 36 =
 

Work out the following mentally.

666 − 51 =
 
  • Question 1

Work out the following mentally.

74 + 19 =
 
CORRECT ANSWER
93
EDDIE SAYS
70 + 10 = 80 4 + 9 = 13 80 + 13 = 93
  • Question 2

Work out the following mentally.

69 + 97 =
 
CORRECT ANSWER
166
EDDIE SAYS
60 + 90 = 150 9 + 7 = 16 150 + 16 = 166
  • Question 3

Work out the following mentally.

997 + 17 =
 
CORRECT ANSWER
1014
EDDIE SAYS
7 + 7 = 14 90 + 10 = 100 900 + 100 = 1000 1000 + 14 = 1014
  • Question 4

Work out the following mentally.

172 + 49 =
 
CORRECT ANSWER
221
EDDIE SAYS
70 + 40 = 110 2 + 9 = 11 110 + 11 = 121 100 + 121 = 221
  • Question 5

Work out the following mentally.

80 + 11 =
 
CORRECT ANSWER
91
EDDIE SAYS
80 + 10 = 90 90 + 1 = 91
  • Question 6

Work out the following mentally.

31 − 18 =
 
CORRECT ANSWER
13
EDDIE SAYS
30 - 10 = 20 8 - 1 = 7 20 - 7 = 13
  • Question 7

Work out the following mentally.

75 − 45 =
 
CORRECT ANSWER
30
EDDIE SAYS
70 - 40 = 30 5 - 5 = 0 30 - 0 = 30
  • Question 8

Work out the following mentally.

293 − 67 =
 
CORRECT ANSWER
226
EDDIE SAYS
90 - 60 = 30 7 - 3 = 4 30 - 4 = 26 200 + 26 = 226
  • Question 9

Work out the following mentally.

61 − 36 =
 
CORRECT ANSWER
25
EDDIE SAYS
60 - 30 = 30 6 - 1 = 5 30 - 5 = 25
  • Question 10

Work out the following mentally.

666 − 51 =
 
CORRECT ANSWER
615
EDDIE SAYS
6 - 1 = 5 60 - 50 = 10 600 + 10 + 5 = 615
---- OR ----

Sign up for a £1 trial so you can track and measure your child's progress on this activity.

What is EdPlace?

We're your National Curriculum aligned online education content provider helping each child succeed in English, maths and science from year 1 to GCSE. With an EdPlace account you’ll be able to track and measure progress, helping each child achieve their best. We build confidence and attainment by personalising each child’s learning at a level that suits them.

Get started
laptop

Start your £1 trial today.
Subscribe from £10/month.