Question

express in cm using decimal. 1) 4 mm; 2), 70 mm; 3)9 cm 8 mm 4); 175mm 5) 80 cm 7 mm .​

Answer 1

1) 4mm = 0.4cm

2) 70mm= 7.0cm

3)9cm 8mm= 9.8cm

4)175mm= 17.5cm

5)80cm 7mm= 80.7cm                                                                                                                      

Answer 2

1) 4 mm

Given -

4 mm

To find -

Convert 4 mm into cm

solution -

To convert mm into cm divide the length value by 10.

Where,

mm - millimetres

cm - centimetres

4 mm

$= \frac{4}{10}$

$= 0.4 \: cm$

By converting we get,

4 mm equal to 0.4 cm .

2) 70 mm

Given -

70 mm

To find -

Convert 70 mm into cm

solution -

To convert mm into cm divide the length value by 10.

Where,

mm - millimetres

cm - centimetres

70 mm

$= \frac{70}{10}$

$= 7.0 \: cm$

By converting we get,

70 mm equal to 7 cm .

3) 9 cm 8 mm

Given -

9 cm 8 mm

To find -

Convert 9 cm 8 mm into cm

solution -

To convert mm into cm divide the length value by 10.

Where,

mm - millimetres

cm - centimetres

8 mm

$= \frac{8}{10}$

$= 0.8 \: cm$

Add the same units value,

9 cm 8 mm

$= 9 + 0.8 = 9.8 \: cm$

By converting we get,

9 cm 8 mm equal to 9.8 cm

4) 175 mm

Given -

175 mm

To find -

Convert 175 mm into cm

solution -

To convert mm into cm divide the length value by 10.

Where,

mm - millimetres

cm - centimetres

175 mm

$= \frac{175}{10}$

$= 17.5 \: cm$

By converting we get,

175 mm equal to 17.5 cm

5) 80 cm 7 mm

Given -

80 cm 7 mm

To find -

Convert 80 cm 7 mm into cm

solution -

To convert mm into cm divide the length value by 10.

Where,

mm - millimetres

cm - centimetres

7 mm

$= \frac{7}{10}$

$= 0.7 \: cm$

Add same units value

80 cm 7 mm

$= 80 + 0.7 = 80.7$

By converting we get,

80 cm 7 mm equal to 80.7 cm .