O-LevelMathematicsNumber4024/12 · May/June 2024 · Q143 Marks
Write 42000000 in standard form.
- (a)Write 42000000 in standard form.[1]
- (b)Evaluate (1.3×10⁻⁴) + (7.4×10⁻³). Give your answer in standard form.[2]
Mark scheme
Marking points from the official mark scheme (May/June 2024). The mark or mark type is shown in brackets.
- [1] (a) 4.2×10⁷ cao
- [2] (b) 7.53×10⁻³ cao
- [1] B1 for answer figs 753
- [1] M1 for 0.13×10⁻³ or 74×10⁻⁴ or for 0.00013 and 0.0074
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