Question

Express $12.3cm$without decimals

Answer 1

Step 1

Break into whole number part and decimal part

$12.3cm=12cm+0.3cm$

Step 2

Convert decimal part into cm

We know that

$$\begin{gathered} 1cm=10mm \\ \Rightarrow 0.3cm=0.3\times 10mm=3mm \end{gathered}$$

Hence $12.3cm$ can be written as $12cm3mm$