Measures and time · Ages 8–9

Kilometres and millimetres worksheet

Covers: Kilometres, Millimetres

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Measures and time · Ages 8–9

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Write each answer in the space. For word problems, show your working and write a sentence answer.

1.5 km = m
Answer:
2.5094 m = km m
Fill in each blank
Answer:
3.9 km 83 m = m
Answer:
4.The strip's left end is at 0. How long is the strip, in millimetres?
Answer:
5.20 cm 7 mm = mm
Answer:
6.162 mm = cm mm
Fill in each blank
Answer:
7.The strip's left end is at 1 cm. How long is the strip, in millimetres?
Answer:

13.The map shows the roads between four places, A, B, C and D. What is the shortest distance from A to D, in metres?
Working:
Answer:
14.A hiking trail is 5 km long and Ka-yee has walked 1100 m. How many more metres must Ka-yee walk?
Working:
Answer:
15.Each lap of a running track is 500 m. Ka-yee runs 6 laps. How many kilometres is that?
Working:
Answer:
16.Ka-yan's pencil is 13 cm 4 mm long. After some sharpening it is 13 mm shorter. How long is it now, in millimetres?
Working:
Answer:
17.A book is 8 mm thick. A pile of 5 of them is mm high, which is cm.
Fill in each blank
Working:
Answer:
18.A red ribbon is 11 cm 5 mm long and a blue one is 57 mm. How many millimetres longer is the longer one?
Working:
Answer:

Show the answers and working

Kilometres and millimetres worksheet: Answers and working

1. 5000
Each kilometre is 1000 m, so multiply 5 by 1000.
1 km = 1000 m: 5 × 1000 = 5000.
2. 5, 94
1000 m is 1 km. Split off the last three digits of 5094.
The last three digits are the metres, 94; the 5 in front is kilometres.
3. 9083
Change 9 km into metres, then add 83 m. Careful: the metres take three digits.
9 × 1000 + 83 = 9083: the metres take three digits.
4. 58 mm
See which whole centimetre the right end has passed, then count the small steps — each is 1 mm.
Read the whole centimetres, then count the small steps, 1 mm each: 58 mm.
5. 207
1 cm = 10 mm. Change 20 cm to millimetres first, then add 7 mm.
20 × 10 + 7 = 207.
6. 16, 2
Every 10 mm is 1 cm. How many tens are there in 162?
Every 10 mm is 1 cm: 162 mm is 16 lots of 10 mm and 2 mm more.
7. 16 mm
The left end isn't at 0. Read where the right end is, then think what 1 cm is in millimetres.
The right end reads 26 mm; subtract the left end's 10 mm: 16 mm.

8. D. km
The distance between two districts is long. Which unit suits a long distance?
The distance between two districts is long, so use kilometres: about 19 km.
9. True
The units differ: change 1 km 220 m into metres first, then compare with 1170 m.
In metres: 1 km 220 m = 1220 m, then compare with 1170 m.
10. D. 6 km
Some are in km and some in m. Change every distance into metres, then compare.
Change them all to metres and compare: the furthest is 6000 m.
11. A. mm
A coin is very thin. Which unit is small enough for something that thin?
A coin is very thin, so use the smallest unit, millimetres: about 2 mm.
12. False
The units differ, so you can't compare yet. Change 10 cm 7 mm into millimetres first.
Same units first: 10 cm 7 mm = 107 mm, then compare with 116 mm.

Marking: 2 for the working, 1 for the answer, 1 for the sentence.

13. 2600 m
Change every road into metres first (1 km = 1000 m), then list each route from A to D and add up its roads.
In metres, route by route: A→B→D 2750 m, A→C→D 3450 m, A→B→C→D 2600 m, A→C→B→D 5100 m. The shortest is 2600 m.
14. 3900 m
Change the trail's 5 km into metres first, then subtract the 1100 m walked.
5 km = 5000 m; 5000 − 1100 = 3900.
15. 3 km
Work out how many metres 6 laps make, then change the metres into kilometres.
500 × 6 = 3000 m = 3 km.
16. 121 mm
Change 13 cm 4 mm into millimetres first, then subtract the 13 mm.
13 cm 4 mm = 134 mm; 134 − 13 = 121.
17. 40, 4
Work out how many millimetres 5 books make, then remember every 10 mm is 1 cm.
8 × 5 = 40 mm; every 10 mm is 1 cm: 4 cm.
18. 58 mm
The two ribbons use different units. Change the red one's 11 cm 5 mm into millimetres first.
The red one is 115 mm; the difference from 57 mm is 58 mm.