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Calculate Without a Calculator (2)

In this worksheet, students pretend that the '5' key on their calculator is broken and select alternative ways to carry out the given calculations.

'Calculate Without a Calculator (2)' worksheet

Key stage:  KS 2

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

Curriculum subtopic:  Solve Multi-Step Add/Subtract Problems

Difficulty level:  

Worksheet Overview

QUESTION 1 of 10

In this worksheet, you have to select alternative ways of carrying out the given calculations because the '5' key is broken on your calculator.

 

Example

Work out   56 45

 

Answer

We could, for example, halve the first number and double the second to get

28 90

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

5245 + 14

5240 + 5 + 14

1000 + 4244 + 1 + 14

1000 + 4246 - 1 + 14

5245 + 10 + 4

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

245 + 55

244 + 1 + 44 + 11

240 + 5 + 14 + 1

246 - 1 + 66 - 11

244 + 56

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

15 x 4

4 x 4 + 4

15 + 15 + 15 + 15

30 x 2

7.5 x 8

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

27 - 55

27 - 54 + 1

27 - 54 - 1

28 - 60

27 - 61 + 6

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

125 - 115

126 - 116

120 + 5 - 110 - 5

125 - 110 - 5

124 -114

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

225 x 11

224 x 11 + 11

224 x 11 + 224

220 x 11 + 4

220 x 11 + 55

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

55 + 518

60 + 468

(110 + 1036) x 0.5

(110 + 1036) ÷ 2

80 + 493

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

28 ÷ 15

28 ÷ (14 + 1)

28 ÷ 4 + 1

28 - 5

112 ÷ 60

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

38.5 ÷ 5

38.5 ÷ (4 + 1)

(38 + 1 ÷ 2) ÷ (4 + 1)

38 - 5

77 ÷ 10

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

6.5 x 4.5

13 x 9

65 x 0.45

13 x 2.25

(13 ÷ 2) x (9 ÷ 2)

  • Question 1

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

5245 + 14

CORRECT ANSWER
1000 + 4244 + 1 + 14
1000 + 4246 - 1 + 14
  • Question 2

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

245 + 55

CORRECT ANSWER
244 + 1 + 44 + 11
246 - 1 + 66 - 11
  • Question 3

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

15 x 4

CORRECT ANSWER
30 x 2
  • Question 4

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

27 - 55

CORRECT ANSWER
27 - 61 + 6
  • Question 5

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

125 - 115

CORRECT ANSWER
126 - 116
124 -114
  • Question 6

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

225 x 11

CORRECT ANSWER
224 x 11 + 11
  • Question 7

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

55 + 518

CORRECT ANSWER
(110 + 1036) ÷ 2
80 + 493
  • Question 8

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

28 ÷ 15

CORRECT ANSWER
28 ÷ (14 + 1)
112 ÷ 60
  • Question 9

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

38.5 ÷ 5

CORRECT ANSWER
(38 + 1 ÷ 2) ÷ (4 + 1)
77 ÷ 10
  • Question 10

Select all the alternative ways to carry out the following calculation without using the '5' key on your calculator.

 

6.5 x 4.5

CORRECT ANSWER
(13 ÷ 2) x (9 ÷ 2)
---- OR ----

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