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Elite Mathematics
IGCSE · 4MA1 · Topic

Using a Calculator: practice questions & worked solutions

Recent 4MA1 Higher papers have not examined Using a Calculator, so these are original exam-style Elite practice questions, sorted from easiest to hardest. Try each one first, then open the worked solution.

7questions
17marks in total
0%of papers (0 of 54) include it – practise it with the Elite questions below
4/3/0easy / medium / hard

Questions, easiest first

Level is estimated from marks: 1–2 easy, 3–4 medium, 5+ hard.

1. Elite Practice · Q1

Easy2 marks
Elite Practice Question 1 (2 marks): Using a Calculator – 1 Work out (5.7^2 - sqrt 30.25) / (1.8 x 0.65). Write down all the figures on your calculator display. (Total for Question 1 is 2 marks)
Show worked solution
  1. Work out the top and the bottom
    \[ 5.7^2-\sqrt{30.25}=32.49-5.5=26.99,\qquad 1.8\times0.65=1.17 \]
  2. Divide
    \[ \frac{26.99}{1.17}=23.06837607\ldots \]
Final answer

\(23.06837607\)

2. Elite Practice · Q3

Easy2 marks
Elite Practice Question 3 (2 marks): Using a Calculator – 3 Work out 8.4 x tan 35 degrees / cos 62 degrees. Give your answer correct to 3 significant figures. (Total for Question 3 is 2 marks)
Show worked solution
  1. Check the calculator is in degrees

    Then

    \[ \frac{8.4\times\tan35^\circ}{\cos62^\circ}=\frac{5.8817\ldots}{0.46947\ldots}=12.528\ldots \]
  2. Round

    \(12.5\) (3 significant figures)

Final answer

\(12.5\)

3. Elite Practice · Q5

Easy2 marks
Elite Practice Question 5 (2 marks): Using a Calculator – 5 p = 2.6, q = -1.8. Work out the value of (p^2 - 3q) / sqrt(p + q^2). Give your answer correct to 3 decimal places. (Total for Question 5 is 2 marks)
Show worked solution
  1. Substitute (brackets round the negative)
    \[ p^2-3q=2.6^2-3(-1.8)=6.76+5.4=12.16 \]
    \[ \sqrt{p+q^2}=\sqrt{2.6+(-1.8)^2}=\sqrt{5.84}=2.4166\ldots \]
  2. Divide and round
    \[ \frac{12.16}{2.4166\ldots}=5.03184\ldots\approx5.032 \]
Final answer

\(5.032\)

4. Elite Practice · Q6

Easy2 marks
Elite Practice Question 6 (2 marks): Using a Calculator – 6 Work out the value of 4.8^-0.5 + 1.7^3. Give your answer correct to 4 significant figures. (Total for Question 6 is 2 marks)
Show worked solution
  1. Evaluate each power
    \[ 4.8^{-0.5}=\frac{1}{\sqrt{4.8}}=0.45643\ldots,\qquad 1.7^3=4.913 \]
  2. Add and round
    \[ 0.45643\ldots+4.913=5.36943\ldots\approx5.369 \]
Final answer

\(5.369\)

5. Elite Practice · Q2

Medium3 marks
Elite Practice Question 2 (3 marks): Using a Calculator – 2 (a) Work out 4.3^3 - 1/0.16. Write down all the figures on your calculator display. (b) Give your answer to part (a) correct to 3 significant figures. (Total for Question 2 is 3 marks)
Show worked solution
  1. (a) Use the calculator
    \[ 4.3^3-\frac{1}{0.16}=79.507-6.25=73.257 \]
  2. (b) Round to 3 significant figures

    The fourth figure is \(5\), so round up: \(73.3\).

Final answer

(a) \(73.257\) (b) \(73.3\)

6. Elite Practice · Q4

Medium3 marks
Elite Practice Question 4 (3 marks): Using a Calculator – 4 Work out (3.7 x 10^5 + 2.9 x 10^4) / (8.1 x 10^-3). Give your answer in standard form correct to 3 significant figures. (Total for Question 4 is 3 marks)
Show worked solution
  1. Add the top
    \[ 3.7\times10^5+2.9\times10^4=370\,000+29\,000=399\,000 \]
  2. Divide
    \[ \frac{399\,000}{8.1\times10^{-3}}=49\,259\,259.26\ldots \]
  3. Standard form, 3 significant figures

    \(4.93\times10^7\)

Final answer

\(4.93\times10^{7}\)

7. Elite Practice · Q7

Medium3 marks
Elite Practice Question 7 (3 marks): Using a Calculator – 7 Here is a calculation: 19.6 x 0.48 / 4.1. (a) By rounding each number to 1 significant figure, work out an estimate. (b) Use your calculator to work out the calculation, correct to 3 significant figures. (Total for Que
Show worked solution
  1. (a) Round each number to 1 significant figure
    \[ \frac{20\times0.5}{4}=\frac{10}{4}=2.5 \]
  2. (b) Calculator value
    \[ \frac{19.6\times0.48}{4.1}=2.2946\ldots\approx2.29 \]
Final answer

(a) \(2.5\) (b) \(2.29\)

More IGCSE Maths 4MA1 topics

Dr Eslam Ahmed
Dr Eslam Ahmed

Elite Mathematics · Questions classified by topic, solutions checked by Dr Eslam