Measures and time · Ages 7–8

Metres and centimetres worksheet

Covers: The metre: measuring and comparing, Metres and centimetres, Estimating lengths, Perimeter: around a shape, Bigger unit, smaller number

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Measures and time · Ages 7–8

Numsprite
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Name:Date:Score:／48

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

1.Each 📏 stands for a metre stick, 1 m long. How long is the rope?
Answer:
2.How many centimetres longer is 5 m than 450 cm?
Answer:
3.5 m 8 cm = ? cm
Answer:
4.352 cm = 3 m ? cm
Answer:
5.416 cm = ? m 16 cm
Answer:
6.A ribbon is 30 cm long. Measured with 2 cm clips it is clips long; measured with 10 cm rulers it is rulers long.
Fill in each blank
Answer:

7.🚌 is about 12 long (or tall). Which unit goes in ?
- A. $
- B. minutes
- C. cm
- D. m
Choose the right answer
Answer:
8.About how long (or tall) is 🚗?
- A. 30 m
- B. 3 m
- C. 3 cm
- D. 1 m
Choose the right answer
Answer:
9.Each of Ka-yee's steps is about 50 cm. After 20 steps, Ka-yee has walked about 10 m.
True or false?
Answer:
10.Each small square's side is 1 cm. Which rectangle has a perimeter of 10 cm?
- A
- B
- C
- D
Choose the right picture
Answer:
11.Each small square's side is 1 cm. What is the perimeter of this rectangle?
- A. 20
- B. 14
- C. 18
- D. 9
Choose the right answer
Answer:
12.A 📎 is shorter than a 🖍️. Measuring the same table with 📎 and with 🖍️, the number is bigger with 🖍️.
True or false?
Answer:

13.May is 1 m 19 cm tall, and Ming is 3 cm shorter. How tall is Ming in centimetres?
Working:
Answer:
14.From Ka-lok's home it is 397 m to the park and 601 m to the library. How much further is the library?
Working:
Answer:
15.A roll of ribbon is 4 m long. After 60 cm is cut off, how many centimetres are left?
Working:
Answer:
16.A floor tile is about 50 cm along each side. A row has 4 of these tiles. About how long is the row in metres?
Working:
Answer:
17.A square photo frame is 10 cm along each side. Ming sticks a ribbon along all four sides. How many cm of ribbon are needed?
Working:
Answer:
18.Ka-yee's stride is 25 cm and Dad's is 50 cm. Ka-yee measures the living room in 12 strides. How many strides does Dad take for the same room?
Working:
Answer:

Show the answers and working

Metres and centimetres worksheet: Answers and working

1. 7 m
Count how many 📏 fit along the rope; each one is 1 m.
1 m fits 7 times: 7 m.
2. 50 cm
Change 5 m into centimetres first, then find the difference from 450 cm.
5 m = 500 cm, and 500 − 450 = 50.
3. 5 m 8 cm = 508 cm
5 m 8 cm: 1 m = 100 cm, 5 × 100 = 500, 500 + 8 = 508
4. 352 cm = 3 m 52 cm
352 cm: 3 m is 3 × 100 = 300 cm, 352 − 300 = 52
5. 416 cm = 4 m 16 cm
416 cm: take off the 16 cm first, 416 − 16 = 400, 400 ÷ 100 = 4
6. 15, 3
With clips: how many lots of 2 are in 30? With rulers: how many lots of 10 are in 30?
The clips are short, so 15 of them; the rulers are long, so just 3: the same ribbon, the bigger the unit, the smaller the number.

7. D. m
Picture how big 🚌 really is: 1 m is about your arms stretched wide, and 1 cm about a finger's width.
Long things take metres, short things centimetres: 1 m is about your arms stretched wide.
8. B. 3 m
Arms stretched wide are about 1 m. About how many of those would 🚗 be?
Arms wide are about 1 m, and 🚗 is about 3 of those: 3 m.
9. True
About how far are two steps, in metres? How many pairs of steps are in 20? Then compare with 10 m.
Two steps make about 1 m, so 20 steps are about 10 m.
10. D
The perimeter is 2 lots of (length + width). What is half of 10? Look for the rectangle whose length and width add up to that.
For each, add a length and a width, then the same again; the one making 10 is right.
11. C. 18
The perimeter counts the sides round the outside, not the squares inside. Start with one length and one width.
4 + 5 + 4 + 5 = 18 cm.
12. False
The shorter the unit, the more goes it takes to measure the same table. Which is shorter, the 📎 or the 🖍️?
The shorter the unit, the more goes it takes and the bigger the number: the shorter 📎 gives the bigger number.

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

13. 116 cm
Change 1 m 19 cm into centimetres first, then take off the 3 cm by which Ming is shorter.
1 m 19 cm = 119 cm, and 119 − 3 = 116.
14. 204 m
To find how much further, take the shorter distance away from the longer one.
601 − 397 = 204.
15. A roll of ribbon is 4 m long. After 60 cm is cut off, how many centimetres are left? (Answer: 340 cm)
100 × 4 = 400; 100 × 4 − 60 = 340
16. 2 m
Each tile is about 50 cm. How long are two tiles? How many pairs of tiles are in 4?
Two tiles are about 1 m, so 4 are about 2 m.
17. 40 cm
A square's four sides are all the same length: 10 cm each.
A square's four sides are equal: 10 + 10 + 10 + 10 = 40 cm.
18. 6 strides
How many of Ka-yee's strides make one of Dad's? With a bigger unit, does the count go up or down?
One of Dad's strides is two of Ka-yee's: a unit twice as big takes half as many, so 12 becomes 6.