Question

Write each of the following as decimals:
(i) $65+\frac{2}{10}+\frac{7}{100}$
(ii) $45+\frac{9}{100}$
(iii) $88+\frac{5}{10}+\frac{2}{1000}$
(iv) $\frac{3}{10}+\frac{7}{1000}$

Answer 1

1) We have $6$ tens, $5$ ones, $2$ tenths and $7$ hundredths.

$\Rightarrow 6\times 10+5\times 1+2\times \frac{1}{10}+7\times \frac{1}{100}=65.27$
Therefore, the decimal number is $65.27$.
2) We have $4$ tens, $5$ ones and $9$ hundredths.

$\Rightarrow 4\times 10+5\times 1+0\times \frac{1}{10}+9\times \frac{1}{100}=45.09$
Therefore, the decimal number is $45.09$.
3) We have $8$ tens, $8$ ones, $5$ tenths and $2$ thousandths.

$\Rightarrow 8\times 10+8\times 1+5\times \frac{1}{10}+0\times \frac{1}{100}+2\times \frac{1}{1000}=88.502$
Therefore, the decimal number is $88.502$.
4) We have $3$ tenths and $7$ thousandths.

$\Rightarrow 0+3\times \frac{1}{10}+0\times \frac{1}{100}+7\times \frac{1}{1000}=0.307$
Therefore, the decimal number is $0.307$.