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Express as cm using decimals
(a) 5 mm
(b) 60 mm
(c) 164 mm
(d) 9 cm 8 mm
(e) 93 mm
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) $93\ mm=93\times\frac{1}{10}\ cm$
$=\frac{93\times1}{10}\ cm$
$=\frac{93}{10}\ cm$
$=9.3\ cm$
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