# Calculator Questions

In this worksheet, students solve questions using a calculator.

Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Use Calculators/Technology for Accuracy

Difficulty level:

### QUESTION 1 of 10

In this worksheet, we will learn to solve problems using a calculator.

For Example:

First clear the calculator display. Remember that the inverse of adding is subtracting, and the inverse of multiplying is dividing.

Also remember that 40 ÷ 10 = 4 and 40 ÷ 4 = 10

Question:

Write in the missing numbers.

79.5 × __________= 773.9

Answer:

On your calculator, work out the inverse, which is 773.9 ÷ 79.5

79.5 ×  9.73459119496  = 773.9

Work out the missing number.

2351.5 ÷ __________ = 51.54

45.62475747

44.52485747

42.63475747

48.62455747

Work out the missing number.

149 ÷ __________ = 14.47

15.19716655

20.39716655

10.29716655

2156.03

Work out the missing number and write it in the box below.

29% of 8892 = _______

Work out the missing number and write it in the box below.

69% of 3565 = _______

Work out the missing number and write it in the box below.

33% of 3779 = _______

Work out the missing number and write it in the box below.

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.

Work out the mising number.

(74 + 10) ÷ (82 + 70)  =  _______

0.5526316

144.12195

71.024390

74.121951

Work out the missing number.

(82 + 13) ÷ (63 + 67)  =  _______

68.5079365

149.206349

0.73076923

82.1

• Question 1

Work out the missing number.

2351.5 ÷ __________ = 51.54

CORRECT ANSWER
45.62475747
EDDIE SAYS
2351.5 ÷ 51.54 = 45.62475747
• Question 2

Work out the missing number.

149 ÷ __________ = 14.47

CORRECT ANSWER
10.29716655
EDDIE SAYS
149 ÷ 14.47 = 10.29716655
• Question 3

Work out the missing number and write it in the box below.

29% of 8892 = _______

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

Work out the missing number and write it in the box below.

69% of 3565 = _______

CORRECT ANSWER
2459.85
EDDIE SAYS
69% is 0.69, so we type 3565 x 0.69 to find the answer 2459.85
• Question 5

Work out the missing number and write it in the box below.

33% of 3779 = _______

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

Work out the missing number and write it in the box below.

71% of 7066 = _______

CORRECT ANSWER
5016.86
EDDIE SAYS
71% is 0.71, so we can do 7066 x 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.

CORRECT ANSWER
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 x 8 = 64.
• Question 8

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

CORRECT ANSWER
3
EDDIE SAYS
3 x 3 = 9, so the square root of 9 is 3.
• Question 9

Work out the mising number.

(74 + 10) ÷ (82 + 70)  =  _______

CORRECT ANSWER
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 the missing number.

(82 + 13) ÷ (63 + 67)  =  _______

CORRECT ANSWER
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
---- OR ----

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