Page 126 - New Medley 3 Semester 2

EXERCISE 5.1

A. Convert these into centimetres.
1. 3 m 2. 5 m 3. 20 m 4. 35 m

5. 5 m 10 cm 6. 9 m 75 cm 7. 22 m 6 cm 8. 60 m 8 cm

B. Convert these into metres and centimetres.
1. 200 cm 2. 300 cm 3. 4500 cm 4. 5000 cm

5. 650 cm 6. 715 cm 7. 8060 cm 8. 9685 cm

C. Convert these into metres.

1. 3 km 2. 4 km 3. 7 km 4. 9 km

5. 6 km 125 m 6. 7 km 500 m 7. 8 km 450 m 8. 9 km 50 m

D. Convert these into kilometres and metres.

1. 2000 m 2. 3000 m 3. 4000 m 4. 5400 m

5. 6500 m 6. 7675 m 7. 8040 m 8. 9009 m

Adding and Subtracting the Units of Length

Addition of Length

We arrange the given lengths under the columns of km (kilometre), m
(metre) and cm (centimetre) and add as usual. We start addition from

the smaller unit and regroup if required.

Example 5: Add 40 m 25 cm and 45 m 65 cm.

m cm

Solution:
4 0 2 5 Step 1: Add the centimetres. 25 + 65 = 90 cm

+ 4 5 6 5 Step 2: Add the metres. 40 + 45 = 85 m

8 5 9 0

Thus, the answer is 85 m 90 cm.

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