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Q.6 Express the following as cm using decimals.
(a) 2 mm
(b) 30 mm
(c) 116 mm
(d) 4 cm 2 mm
(e) 162 mm
(f) 83 mm


Answer :

We know that 10 mm = 1 cm.
\(\therefore \) 1mm = \(\frac{1}{10} \) cm
(a) 2 mm = 2 × \(\frac{1}{10} \) cm = \(\frac{2}{10} \) cm = 0.2 cm

(b) 30 mm = 30 × \(\frac{1}{10} \) cm = 3cm

(c) 116 mm =116 × \(\frac{1}{10} \) cm = \(\frac{116}{10} \) cm = 11.6 cm

(d) 4 cm 2 mm = 4 cm+ 2× \(\frac{1}{10} \) cm = 4 + 0.2 = 4.2 cm

(e) 162 mm = 162 × \(\frac{1}{10} \) cm = \(\frac{162}{10} \) cm = 16.2

(f) 83 mm = 83 × \(\frac{1}{10} \) cm = \(\frac{83}{10} \) cm = 8.3 cm

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