Express as cm using decimals
(a) 5 mm
(b) 60 mm
(c) 164 mm
(d) 9 cm 8 mm
(e) 93 mm

AcademicMathematicsNCERTClass 6

To do:

We have to express the given numbers as cm using decimals.

Solution:

We know that,

$1\ cm=10\ mm$

This implies,

$1\ mm=\frac{1}{10}\ cm$

Therefore,

(a) $5\ mm=5\times\frac{1}{10}\ cm$

$=\frac{5\times1}{10}\ cm$

$=\frac{5}{10}\ cm$

$=0.5\ cm$

(b) $60\ mm=60\times\frac{1}{10}\ cm$

$=\frac{60\times1}{10}\ cm$

$=\frac{60}{10}\ cm$

$=6\ cm$

(c) $164\ mm=164\times\frac{1}{10}\ cm$

$=\frac{164\times1}{10}\ cm$

$=\frac{164}{10}\ cm$

$=16.4\ cm$

(d) $8\ mm=8\times\frac{1}{10}\ cm$

$=\frac{8\times1}{10}\ cm$

$=\frac{8}{10}\ cm$

$=0.8\ cm$

 This implies,

$9\ cm\ 8\ mm=(9+0.8)\ cm$

$=9.8\ cm$

(e) $93\ mm=93\times\frac{1}{10}\ cm$

$=\frac{93\times1}{10}\ cm$

$=\frac{93}{10}\ cm$

$=9.3\ cm$

raja
Updated on 10-Oct-2022 13:36:10

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