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Length Conversion and Perimeter

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Length Conversion and Perimeter

Convert units carefully. Show your working for perimeter problems. Use 1 m = 100 cm and 1 cm = 10 mm.

Length Conversions

1.Convert 3.6 metres to centimetres.

2.Convert 920 millimetres to centimetres.

3.Convert 2.4 metres to millimetres.

4.Convert 68 centimetres to metres.

5.Which measurement is the longest?

145 cm
1.3 m
1,420 mm
0.98 m

6.A skipping rope is 2.35 m long. Write its length in centimetres and in millimetres.

7.Match each measurement on the left with its equivalent measurement on the right.

4.2 m
750 mm
0.36 m
3.6 cm

420 cm
75 cm
360 mm
0.036 m

Perimeter Calculations

8.A rectangle is 15 cm long and 7 cm wide. Calculate its perimeter.

9.A square has sides of 1.8 m. What is its perimeter in centimetres?

10.A rectangle has a length of 730 mm and a width of 55 cm. Calculate its perimeter in centimetres.

Perimeter in Everyday Situations

11.Kai is putting a border around a rectangular veggie patch. It measures 5.2 m by 340 cm. How many metres of border are needed to go all the way around?

12.A rectangular noticeboard has edges measuring 32 cm, 320 mm, 0.27 m and 270 mm. Find its perimeter in centimetres.

13.A step-shaped outline is made by joining a 7 cm by 4 cm rectangle to a 3 cm by 2 cm rectangle along one complete 2 cm side. The rectangles do not overlap. Find the perimeter of the outside edge.