Converting units of length | Maths | Quizalize & Oak National Academy

Starter quiz

Match the expression to their product.

4 × 100 =

⇔

400 ✓

4 × 10 =

⇔

40 ✓

4 × 1 =

⇔

4 ✓

6 × 10 =

⇔

60 ✓

6 × 100 =

⇔

600 ✓

6 × 0 =

⇔

0 ✓
13.09 x 10 = ?

13.090

13.9

139

130.9 ✓

1309
When we multiply 0.72 by 100, what is the new value of the digit 7?

seven hundredths

seven tenths

seven ones

seven tens ✓

seven hundreds
Match the expression to the correct product.

0.31 × 10

⇔

3.1 ✓

0.31 × 1,000

⇔

310 ✓

5.76 × 10

⇔

57.6 ✓

5.76 × 100

⇔

576 ✓

0.23 × 10

⇔

2.3 ✓

0.23 × 100

⇔

23 ✓
Lucas is thinking of a number. His number is one hundredth times the size of 4 What is his number?

0.004

0.04 ✓

0.4

40

40
What is the perimeter of a rectangular field of length 350 m and width 250 m? ______ m.

'1,200' ✓

Exit quiz

Match the equivalent lengths

10.3 cm `

⇔

103 mm ✓

13 cm

⇔

130 mm ✓

130 cm

⇔

1,300 mm ✓

130 cm

⇔

1.3 m ✓

1030 cm

⇔

10.3 m ✓
Match the equivalent lengths.

250 cm

⇔

25 dm ✓

250 cm

⇔

2.5 m ✓

25 m

⇔

250 dm ✓

25 m

⇔

2,500 cm ✓

25 dm

⇔

2,500 mm ✓
Which of these is the correct conversion of 9,035 m into km?

9,035 m × 1,000 = 9,035,000 km

9,035 m ÷ 1,000 = 0.935 km

9,035 m ÷ 1,000 = 0.9035 km

9,035 m ÷ 100 = 90.35 km

9,035 m ÷ 1,000 = 9.035 km ✓
True or false? A line measuring 104 mm is longer than a line measuring 11 cm.

True
False ✓
Starting with the smallest, put these measurements in order.

1

⇔

603 cm

2

⇔

6.1 m

3

⇔

613 cm

4

⇔

6.3 m

5

⇔

631 cm
The width of a rectangular lake is 700 m and the length is 0.91 km. What is the perimeter of the lake? Give your answer in kilometres. ______ km

'3.22' ✓

Worksheet

Loading worksheet ...

Presentation

Loading presentation ...

Video

Lesson Details

Key learning points

There are 10 mm in 1 cm.
There are 100 cm in 1 m.
There are 1,000 m in 1 km.
There are 1,000 mm in 1 m.
There are 10 dm in 1 m.

Common misconception

Children may confuse when to multiply or when to divide.

Encourage children to think about which unit of measure is larger e.g. km are larger than m. In a given amount, there will be fewer of the larger unit so we need to divide.

Keywords

Convert - To convert means to change a value or expression from one form to another. In this context it means to change from one unit of measurement to another such as from cm to mm.
Decimetre - A decimetre is a metric unit of length, equal to one-tenth of a metre. Decimetre can be abbreviated to dm.