# Calculator Questions

In this worksheet, students solve number problems using a calculator.

Key stage:  KS 2

Curriculum topic:   Maths and Numerical Reasoning

Curriculum subtopic:   Mixed Problems

Difficulty level:

### QUESTION 1 of 10

In this worksheet, you must solve problems using a calculator.

First clear the calculator display.

Remember that:

• the inverse of adding is subtracting
• the inverse of multiplying is dividing

Also remember that:

• 40 ÷ 10 = 4 and 40 ÷ 4 = 10

Example 1

Write in the missing number.

79.5 × ________ = 773.9

On your calculator, work out the inverse, which is

773.9 ÷ 79.5 = 9.73459119496

So, we write

79.5 × 9.73459119496 = 773.9

Example 2

Work out

45% of 3404

45% is 45/100 which is 0.45 as a decimal.

So, on the calculator, we work out

0.45 × 3404 = 1531.8

Work out the missing number.

2351.5 ÷ __________ = 51.54

48.62455747

42.63475747

44.52485747

45.62475747

Work out the missing number.

149 ÷ __________ = 14.47

10.29716655

20.39716655

15.19716655

2156.03

Work out the missing number.

29% of 8892 = _______

Work out the missing number.

69% of 3565 = _______

Work out the missing number.

33% of 3779 = _______

Work out the missing number.

71% of 7066 = _______

Work out what the square root of 64 is, and write it in the box below.

Work out what the square root of 9 is, and write it in the box below.

(74 + 10) ÷ (82 + 70)  =  _______

74.121951

71.024390

144.12195

0.5526316

Work out

(82 + 13) ÷ (63 + 67)  =  _______

0.73076923

149.206349

68.5079365

82.1

• Question 1

Work out the missing number.

2351.5 ÷ __________ = 51.54

45.62475747
EDDIE SAYS
2351.5 ÷ 51.54 = 45.62475747
• Question 2

Work out the missing number.

149 ÷ __________ = 14.47

10.29716655
EDDIE SAYS
149 ÷ 14.47 = 10.29716655
• Question 3

Work out the missing number.

29% of 8892 = _______

2578.68
EDDIE SAYS
Remember that 29% is the same as 29/100 or 0.29, so we can then do 8892 × 0.29 to find the answer 2578.68.
• Question 4

Work out the missing number.

69% of 3565 = _______

2459.85
EDDIE SAYS
69% is 0.69, so we type 3565 × 0.69 to find the answer 2459.85.
• Question 5

Work out the missing number.

33% of 3779 = _______

1247.07
EDDIE SAYS
33% is 0.33, so we can do 3779 × 0.33 to find the answer 1247.07.
• Question 6

Work out the missing number.

71% of 7066 = _______

5016.86
EDDIE SAYS
71% is 0.71, so we can do 7066 × 0.71 to find the answer 5016.86.
• Question 7

Work out what the square root of 64 is, and write it in the box below.

8
EDDIE SAYS
Remember, the square root is the number which, when multiplied by itself, gives 64.
In this case, the answer is 8, as 8 × 8 = 64.
• Question 8

Work out what the square root of 9 is, and write it in the box below.

3
EDDIE SAYS
3 × 3 = 9, so the square root of 9 is 3.
• Question 9

(74 + 10) ÷ (82 + 70)  =  _______

0.5526316
EDDIE SAYS
First, we need to work out the numbers in the brackets.
74 + 10 = 84, and 82 + 70 = 152
We then divide 84 by 152.
So, 84 ÷ 152 = 0.5526316.
• Question 10

Work out

(82 + 13) ÷ (63 + 67)  =  _______

0.73076923
EDDIE SAYS
First, we need to work out the numbers in the brackets.
82 + 13 = 95, and 63 + 67 = 130
We then divide 95 by 130.
So, 95 ÷ 130 = 0.73076923.
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