Page 49 - Mathematics Coursebook

4.1 Knowing metric units

) Exercise 4.1

1 Write down the appropriate letter, A, B, C or D, for the correct method for each conversion.
a m to cm A × 100 B ÷ 100 C × 1000 D ÷ 1000
b ml to l A × 100 B ÷ 100 C × 1000 D ÷ 1000
c kg to g A × 100 B ÷ 100 C × 1000 D ÷ 1000
d kg to t A × 100 B ÷ 100 C × 1000 D ÷ 1000
2 Convert these lengths into the units shown.
a 80 mm = cm b 12 cm = mm c 3 m = cm
d 5000 m = km e 560 cm = m f 45 mm = cm
g 4.3 km = m h 1.8 m = cm i 895 m = km
3 Convert these masses into the units shown.
a 8000 kg = t b 2 kg = g c 3.4 t = kg
d 5400 g = kg e 0.8 kg = t f 425 g = kg
4 Convert these capacities into the units shown.
a 9000 ml = l b 4 l = ml c 5.2 l = ml
d 3200 ml = l e 0.5 l = ml f 680 ml = l
5 a Copy and complete these conversions. All the answers are in the box.
i 4.3 t × = 4300 kg ii 8.5 × 10 = 85 mm 43 kg 32 cm 670
iii 67 mm 10 = 6.7 cm iv 0.43 m × 100 = cm g × ÷ 10 1000
v ml ÷ 1000 = 0.67 l vi 850 ÷ 1000 = 0.85

b There are three answers in the box that haven’t been used.
Write your own conversion that includes these three answers.

6 Write the decimal measurements in each set in order of size, starting with the smallest.
a 35 cm, 0.38 m, 270 mm b 4.2 l, 795 ml, 0.8 l
c 0.125 kg, 0.08 kg, 95 g d 6250 m, 6.2 km, 6.05 km

7 This is part of Mouna’s homework.
Is Mouna correct? Explain your answer. Question Convert 2.3 m into mm.
8 Shadi has four bottles. Solution 2.3 × 1000 = 2300 mm

A B C D
650 ml 0.38 l 5020 ml 0.045 l

The bottles hold 650 ml, 0.38 l, 5020 ml and 0.045 l.
1
Shadi want to use the bottle that holds closest to litre.
2
Which bottle should he use? Show your working.
9

I am thinking of a length. My length is a whole number of
centimetres. It is smaller than 0.328 m but larger than 315 mm.

What length is Sasha thinking of ?
48 4 Length, mass and capacity 4 Length, mass and capacity