Page 129 - Start Up Mathematics_4

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Measurement

Let’s Recall ...

• 100 cm = 1 m • 1,000 m = 1 km

• 1,000 g = 1 kg • 1,000 mL = 1 L

1 Convert and fill in the blanks.

(a) 6 km = ________ m (b) 19 km 360 m = ________ m
(c) 5,393 m = ________ km (d) 1,900 m = ________ km
(e) 94 kg = ________ g (f) 38 kg 75 g = ________ g

(g) 4,329 g = ________ kg (h) 9,215 g = ________ kg
(i) 42 L = ________ mL (j) 56 L 295 mL = ________ mL
(k) 500 mL = ________ L (l) 4,520 mL = ________ L ________ mL

2 Add.
(a) 78 kg 435 g and 34 kg (b) 125 km and 68 km 50 m

3 Subtract.
(a) 20 L 375 mL from 350 L 735 mL (b) 820 g from 5 kg 725 g

Smaller Units of Measurement

Length
Try These!
You have learnt to measure the length of small objects
using a ruler by keeping one end of the object at zero Using a ruler, measure the
mark. length of:
(a) an eraser
If the scale is broken at zero mark, we can still measure (b) your pencil
length. Look at the given example. (c) a piece of chalk
(d) a pair of scissors

0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

Keep the object with one end at mark 3. The other end is at mark 7. So, the length of the
object is 7 – 3 = 4 cm.
Observe that there are small markings between any two numbers on a ruler. For example,
there are 10 small markings (or divisions) between 0 and 1. Each small division is for
1 millimetre.

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