Page 129 - New Medley 4 Semester 2 PDF (Merged)

(f) 7 km 250 m = 7 × 1000 m + 250 m = 7000 m + 250 m
= 7250 m

Example 2: Convert:

(a) 40 mm into cm (b) 700 cm into m

(c) 8000 m into km (d) 3125 m into km and m

(e) 530 cm into m and cm (f) 68 mm into cm and mm

1
Solution: (a) 40 mm = (40 ÷ 10) cm = 4 cm ( 1 mm = cm)
10

1
(b) 700 cm = (700 ÷ 100) m = 7 m ( 1 cm = m)
100
1
(c) 8000 m = (8000 ÷ 1000) km = 8 km ( 1 m = km)
1000

(d) 3125 m = 3000 m + 125 m = 3 × 1000 m + 125 m

= 3 km 125 m

3125
or 3125 m = km = 3.125 km
1000

(e) 530 cm = 500 cm + 30 cm = 5 × 100 cm + 30 cm

= 5 m 30 cm

530
or 530 cm = m = 5.30 m
100

(f) 68 mm = 60 mm + 8 mm = 6 × 10 mm + 8 mm

= 6 cm 8 mm

68
or 68 mm = cm = 6.8 cm
10 ÷ 1000

Mass

The commonly used units are gram and kilogram.
g kg
Z Z To convert kg into g, multiply it by 1000.

Z Z To convert g into kg, divide it by 1000.
× 1000

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