Question

Add the following decimals and then express it as a fraction.

7.205, 8.012, 3.1, 4.9, 27.3, 3.0009, 8.0102. [4 MARKS]

Answer 1

Making them into like decimals: 1 Mark
Mathematical operation: 1 Mark
Fraction expression: 2 Marks

Now converting the decimals given into like decimals and adding it.

$\underset{–}{0}7.205\underset{–}{0}$

$\underset{–}{0}8.012\underset{–}{0}$

$\underset{–}{0}3.1\underset{–}{0}\underset{–}{0}\underset{–}{0}$

$\underset{–}{0}4.9\underset{–}{0}\underset{–}{0}\underset{–}{0}$

$27.3\underset{–}{0}\underset{–}{0}\underset{–}{0}$

$\underset{–}{0}3.0009$

$\underset{–}{0}8.0102$

We get $61.4281$

(II) Now, 61. 4281 can be rounded up

to 61.428

to 61. 43

to 61. 4

Now
$61.4=\frac{61.4÷2}{100÷2}=\frac{307}{50}=6\frac{7}{50}$