Approximation and Errors

Hong Kong

Stage 1 - Stage 3

Complete the following expression.

$4000$4000$=$= $\editable{}$ × $10^3$103

Easy

< 1min

Complete the following expression.

Easy

< 1min

Given that $1$1÷$10$10 = $1\times\frac{1}{10}=1\times10^{-1}$1×110=1×10−1,

Express $7$7÷$10^2$102 in scientific notation form.

Easy

1min

If we round to $1$1 significant figure, sound travels at a speed of approximately $0.3$0.3 kilometres per second, while light travels at a speed of approximately $300000$300000 kilometres per second.

Easy

3min

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