Page 130 - Maths Skill - 3

128 Maths

Example 3: Convert 700 cm into m.

Solution: 700 cm = (700 ÷ 100) m = 7 m

Example 4: Convert 625 cm into m and cm.

Solution: 625 cm = 600 cm + 25 cm = (600 ÷ 100) m + 25 cm

= 6 m + 25 cm = 6 m 25 cm

Example 5: Convert 5 km and 6 km into m. Challenge

Solution: 5 km = (5 × 1000) m = 5000 m I am used to measure how
long or short.
6 km = (6 × 1000) m = 6000 m In meters or centimeters,
I report from end to end,
Example 6: Convert 8 km 70 m into m. I span the distance what am I?

Solution: 8 km 70 m = (8 × 1000) m + 70 m Use your math brilliance!

= 8000 m + 70 m = 8070 m

Example 7: Convert 5008 m into km and m.
Solution: (a) 5008 m = 5000 m + 8 m = (5000 ÷ 1000) km + 8 m

= 5 km + 8 m = 5 km 8 m

Exercise 10.1

1. Circle the suitable unit to measure the following.
(a) Length of a mobile phone m cm km

(b) Length of your notebook m cm km

(c) Height of school building m cm km
(d) Length of a river m cm km

(e) Distance between two cities m cm km
2. Convert the following into centimetres.

(a) 5 m (b) 12 m (c) 90 m 35 cm (d) 48 m 62 cm
3. Convert the following into metres.

(a) 300 cm (b) 1400 cm (c) 2810 cm (d) 525 cm

4. Convert the following into metres.
(a) 8 km (b) 9 km 30 m (c) 15 km 20 m (d) 5 km 65 m

5. Convert the following into kilometres and metres.

(a) 5312 m (b) 4325 m (c) 8009 m