Question

The difference between ($4$ tens $12$ tenths and $25$ hundredths) and ($3$ tens $14$ tenths and $45$ thousandths) is __.

• A. $10.05$
• B. $10.005$
• C. $10.5$
• D. $15.005$

Answer 1

The correct option is B $10.005$

$4$ tens $12$ tenths and $25$ hundredths
$=4\times 10+\frac{12}{10}+\frac{25}{100}=40+1.2+0.25=41.45$
$3$ tens $14$ tenths and $45$ thousandths
$=3\times 10+\frac{14}{10}+\frac{45}{1000}$
$=30+1.4+0.045=31.445$
Required difference
$=41.45-31.445=10.005$.