Decimal numbers are the basis of metric measurements. They make calculations so much easier when converting from centimetres to metres, or from kilograms to grams for example. That’s because larger metric units are divided into tens, hundreds or thousands of smaller ones.
This series of quizzes is a little more difficult than those before it. However, by now you should have a very good grasp of decimal numbers, so you’ll be more than capable of answering these questions. If you are in any doubt, then go back and revisit our easier 11+ maths quizzes to get more practice.
Most of the questions you’ll find here concentrate on converting one measurement into another – something you’ll be called on to do often in real life. So, the more you familiarise yourself with doing it, the better placed you’ll be.
Take your time and read the helpful comments after each question. But, most of all, enjoy!
1.
|
What is 21.63 kilometres in centimetres? |
|
[ ] |
2,163 cm |
[ ] |
21,630 cm |
[ ] |
2,163,000 cm |
[ ] |
216,300 cm |
|
|
2.
|
How many kilograms are there in 2.3 tonnes? |
|
[ ] |
2,300,000 |
[ ] |
23,000 |
[ ] |
230 |
[ ] |
2,300 |
|
|
3.
|
What is 14,253 centimetres in metres? |
|
[ ] |
1,425.3 m |
[ ] |
1.4253 m |
[ ] |
14.253 m |
[ ] |
142.53 m |
|
|
4.
|
How many square centimetres are there in 15.3 square metres? |
|
[ ] |
1,530 cm² |
[ ] |
15,300 cm² |
[ ] |
153,000 cm² |
[ ] |
1,530,000 cm² |
|
|
5.
|
How many kilograms are there in 7,531.09 grams? |
|
[ ] |
0.753109 kg |
[ ] |
7.53109 kg |
[ ] |
75.3109 kg |
[ ] |
753.109 kg |
|
|
6.
|
What was 987.654 divided by if the answer is 0.987654? |
|
[ ] |
1,000 |
[ ] |
100 |
[ ] |
10,000 |
[ ] |
10 |
|
|
7.
|
What was 9.87654 multiplied by if the answer is 987.654? |
|
[ ] |
100 |
[ ] |
10 |
[ ] |
1,000 |
[ ] |
10,000 |
|
|
8.
|
What does 0.00025 have to be multiplied by to give 2.5? |
|
[ ] |
1,000 |
[ ] |
10,000 |
[ ] |
100,000 |
[ ] |
100 |
|
|
9.
|
The marathon is a race over a distance of 42.195 kilometres. How many metres is that? |
|
[ ] |
4,219,500 m |
[ ] |
421,950 m |
[ ] |
42,195 m |
[ ] |
4,219.5 m |
|
|
10.
|
A gold bar weighs 12,442.61 grams. How many kilograms does a gold bar weigh? |
|
[ ] |
1.244261 kg |
[ ] |
1,244.261 kg |
[ ] |
124.4261 kg |
[ ] |
12.44261 kg |
|
|
1.
|
What is 21.63 kilometres in centimetres? |
|
[ ] |
2,163 cm |
[ ] |
21,630 cm |
[x] |
2,163,000 cm |
[ ] |
216,300 cm |
|
|
2.
|
How many kilograms are there in 2.3 tonnes? |
|
[ ] |
2,300,000 |
[ ] |
23,000 |
[ ] |
230 |
[x] |
2,300 |
|
|
3.
|
What is 14,253 centimetres in metres? |
|
[ ] |
1,425.3 m |
[ ] |
1.4253 m |
[ ] |
14.253 m |
[x] |
142.53 m |
|
|
4.
|
How many square centimetres are there in 15.3 square metres? |
|
[ ] |
1,530 cm² |
[ ] |
15,300 cm² |
[x] |
153,000 cm² |
[ ] |
1,530,000 cm² |
|
|
5.
|
How many kilograms are there in 7,531.09 grams? |
|
[ ] |
0.753109 kg |
[x] |
7.53109 kg |
[ ] |
75.3109 kg |
[ ] |
753.109 kg |
|
|
6.
|
What was 987.654 divided by if the answer is 0.987654? |
|
[x] |
1,000 |
[ ] |
100 |
[ ] |
10,000 |
[ ] |
10 |
|
|
7.
|
What was 9.87654 multiplied by if the answer is 987.654? |
|
[x] |
100 |
[ ] |
10 |
[ ] |
1,000 |
[ ] |
10,000 |
|
|
8.
|
What does 0.00025 have to be multiplied by to give 2.5? |
|
[ ] |
1,000 |
[x] |
10,000 |
[ ] |
100,000 |
[ ] |
100 |
|
|
9.
|
The marathon is a race over a distance of 42.195 kilometres. How many metres is that? |
|
[ ] |
4,219,500 m |
[ ] |
421,950 m |
[x] |
42,195 m |
[ ] |
4,219.5 m |
|
|
10.
|
A gold bar weighs 12,442.61 grams. How many kilograms does a gold bar weigh? |
|
[ ] |
1.244261 kg |
[ ] |
1,244.261 kg |
[ ] |
124.4261 kg |
[x] |
12.44261 kg |
|
|
Next, convert m to cm by multiplying by 100. So, 21,630 x 100 = 2,163,000