Dividing numbers in standard form

Quiz by Oak National Academy: GCSE Maths Foundation (2)

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Q 1/6
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______ form is when a number is written in the form $A × 10^n$ , where $1 ≤ A < 10$ and $n$ is an integer.
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6 questions

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Q1
______ form is when a number is written in the form $A × 10^n$ , where $1 ≤ A < 10$ and $n$ is an integer.
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30s
Q2
Calculate $(2.3\times10^7)\times(3\times10^2)$
$6.9\times10^9$
$5.3\times10^9$
$5.3\times10^{14}$
$6.9\times10^{14}$
30s
Q3
Calculate $(2.6\times10)\times(2\times10^{-2})$ .
$5.2\times10^{-3}$
$5.2\times10^{-1}$
$4.6\times10^{-3}$
$4.6\times10^{-1}$
30s
Q4
Jacob correctly rewrites the calculation $(2\times10^{-2})\times110\text{ }000\times(3\times10^4)$ as an equivalent calculation using standard form. Which of these shows Jacob's calculation?
$(2\times10^{-2})\times(11\times10^4)\times(3\times10^4)$
$(2\times10^{-2})\times(11\times10^3)\times(3\times10^4)$
$(2\times10^{-2})\times(1.1\times10^4)\times(3\times10^4)$
$(2\times10^{-2})\times(1.1\times10^5)\times(3\times10^4)$
30s
Q5
Calculate $(2\times10^{-2})\times110\text{ }000\times(3\times10^4)$ .
$6.6\times10^2$
$6.1\times10^7$
$6.6\times10^7$
$6.1\times10^2$
30s
Q6
The radius of Jupiter is $7.1\times10^4$ km. What is the diameter of Jupiter? Give your answer in standard form.
$3.55\times10^2$ km
$1.42\times10^8$ km
$3.55\times10^4$ km
$14.2\times10^4$ km
$1.42\times10^5$ km
30s

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