Aussie Maths & Science Teachers: Save your time with SmarterEd
Locky got a new car and recorded how many litres of petrol he put into the car over 4 weeks.
Week 1: 62.35 litres
Week 2: 58.65 litres
Week 3: 44.95 litres
Week 4: 53.75 litres
To estimate how many litres of petrol he put into his car over the 4 weeks, Locky rounded the weekly amounts to the nearest 10 litres and added them.
How much was Locky's estimate?
| `240\ text(litres)` | `230\ text(litres)` | `210\ text(litres)` | `200\ text(litres)` |
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`210\ text(litres)`
| `text{Estimate (after rounding)}` | `= 60 + 60 + 40 + 50` |
| `= 210\ text(litres)` |
The distance between the Earth and the moon is 384 712 303 metres.
How far is that to the nearest million?
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`380\ 000\ 000` |
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`385\ 000\ 000` |
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`384\ 700\ 000` |
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`384\ 710\ 000` |
`385\ 000\ 000`
`385\ 000\ 000`
The area of New South Wales is 1 896 790 square kilometres.
What is the area rounded to the nearest thousand square kilometres?
| `1\ 000\ 000` | `1\ 800\ 000` | `1\ 896\ 000` | `1\ 897\ 000` |
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`1\ 897\ 000`
`1\ 897\ 000`
The number 27 982 can be rounded in different ways.
Which two ways of rounding give the same answer?
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rounding to the nearest ten and nearest hundred |
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rounding to the nearest ten and nearest thousand |
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rounding to the nearest hundred and nearest thousand |
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rounding to the nearest thousand and nearest ten thousand |
`text(rounding to the nearest hundred and nearest thousand)`
`27\ 982 = 28\ 000\ \ text{(rounding to nearest 100)}`
`27\ 982 = 28\ 000\ \ text{(rounding to nearest 1000)}`
`:.\ text(Rounding to the nearest hundred and nearest)`
`text(thousand give the same answer.)`