iGCSE Mathematics (0580) :E1.8 Use the four rules for calculations with whole numbers, decimals and fractions (including mixed numbers and improper fractions), including correct ordering of operations and use of brackets. iGCSE Style Questions Paper 2

Question

Calculate \(4.8 \times 10^{6} + 3.7 \times 10^{7}\). Give your answer in standard form.

▶️ Answer/Explanation

Answer: \(4.18 \times 10^{7}\)

Convert both terms to the same exponent (\(10^7\)): \(0.48 \times 10^7 + 3.7 \times 10^7 = 4.18 \times 10^7\).

Question

Calculate the value of \((2.3\times 10^{-3})+(6.8\times 10^{-4})\).
Give your answer in standard form.

▶️ Answer/Explanation

Answer: \(2.98 \times 10^{-3}\)

Convert \(6.8 \times 10^{-4}\) to \(0.68 \times 10^{-3}\), add to \(2.3 \times 10^{-3}\), and simplify.

Resources