Question

19.20 cm less than 7m 90 cm.​

Answer 1

19.20 cm less than 7m 90 cm

That means,

7m 90cm - 19.20cm

(First the units are not same. so change the units in order to proceed with the following question)

(metre as centimeter)

$1 \: m \: = 100cm \: \\ 7m \: 90cm \: = \:100 \times 7 + 90 \: cm \: \\ 7m \: 90cm = 700 + 90 \: cm \: \: \: \: \: \: \: \: \: \\ 7m \: 90cm \: = \: 790 \: cm \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \:$

(Now subtract the units)

$\: \: \: \: \: \: \: \: 790.00 \\ \: \: \: \: \: - 019.20 \\ = \: \: 770.8$

So, we can conclude that 19.20 cm less than 7m 90cm

= 770.8 cm//

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