The length of Ramesh's notebook is 9 cm and 5 mm. What will be its length in cm? [2 marks]

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Solution

$∵ 10 m m = 1 c m$

$∴ 1 m m = \frac{1}{10} c m$ [0.5 mark]

$9 c m a n d 5 m m = 9 c m + 5 m m = 9 c m + \frac{5}{10} c m = 9 c m + 0.5 c m = 9.5 c m$

[1.5 marks]

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