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Mental Calculations (2)

In this worksheet, students perform mental calculations with mixed operations involving some large numbers.

'Mental Calculations (2)' 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, follow the instructions in the given order to get to the final answer.

All calculations should be done mentally.

Know all times tables up to 12 as well as division, addition and subtraction facts.

 

Example 1

30 → × 4+ 20÷ 7 → ?

 

Answer

We start with 30 × 4 = 120.

Then 120 + 20 = 140.

Then 140 ÷ 7 = 20.

 

Example 2

1320 → ÷ 110+ 60× 2÷ 12 → ?

 

Answer

We start with 1320 ÷ 110.

This is the same as 132 ÷ 11 = 12.

Then 12 + 60 = 72.

Then 72 × 2 = 144.

Then 144 ÷ 12 = 12.

Work out:

 

15 → × 4+ 10÷ 2 → ?

Work out:

 

300 → × 5÷ 10÷ 2 → ?

Work out:

 

17 → × 3- 1× 20 → ?

Work out:

 

90 → + 5× 2- 5 → ?

Work out:

 

1200 → + 4÷ 4- 4 → ?

Work out:

 

276 → + 4× 2÷ 80 → ?

Work out:

 

206 → + 4÷ 7× 120 → ?

Work out:

 

4500 → ÷ 9+ 5÷ 5× 10 → ?

Work out:

 

1440 → ÷ 12× 5- 6÷ 6 → ?

Work out:

 

750 → + 9× 2- 8÷ 2 → ?

  • Question 1

Work out:

 

15 → × 4+ 10÷ 2 → ?

CORRECT ANSWER
35
EDDIE SAYS
15 → 60 → 70 → 35
  • Question 2

Work out:

 

300 → × 5÷ 10÷ 2 → ?

CORRECT ANSWER
75
EDDIE SAYS
300 → 1500 → 150 → 75
  • Question 3

Work out:

 

17 → × 3- 1× 20 → ?

CORRECT ANSWER
1000
EDDIE SAYS
17 → 51 → 50 → 1000
  • Question 4

Work out:

 

90 → + 5× 2- 5 → ?

CORRECT ANSWER
185
EDDIE SAYS
90 → 95 → 190 → 185
  • Question 5

Work out:

 

1200 → + 4÷ 4- 4 → ?

CORRECT ANSWER
297
EDDIE SAYS
1200 → 1204 → 301 → 297
  • Question 6

Work out:

 

276 → + 4× 2÷ 80 → ?

CORRECT ANSWER
7
EDDIE SAYS
276 → 280 → 560 → 7
  • Question 7

Work out:

 

206 → + 4÷ 7× 120 → ?

CORRECT ANSWER
3600
EDDIE SAYS
206 → 210 → 30 → 3600
  • Question 8

Work out:

 

4500 → ÷ 9+ 5÷ 5× 10 → ?

CORRECT ANSWER
1010
EDDIE SAYS
4500 → 500 → 505 → 101 → 1010
  • Question 9

Work out:

 

1440 → ÷ 12× 5- 6÷ 6 → ?

CORRECT ANSWER
99
EDDIE SAYS
1440 → 120 → 600 → 594 → 99
  • Question 10

Work out:

 

750 → + 9× 2- 8÷ 2 → ?

CORRECT ANSWER
755
EDDIE SAYS
750 → 759 → 1518 → 1510 → 755
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