Question

Match the following.

• A. 7.7
• B. 1.62
• C. 8.27
• D. 7.5

Answer 1

Addition and subtraction of decimals is similar to the addition and subtraction of whole numbers.
Only difference is that the decimal point of two numbers need to be aligned.

$2.5+\underset{–}{5.2}\underset{–}{7.7}$
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$312\text{/}4.\text{/}25-\underset{–}{2.63}\underset{–}{1.62}$
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$8.2+\frac{7}{100}=8.2+0.07$

$8.20+\underset{–}{0.07}\underset{–}{8.27}$
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$8.2-\frac{7}{10}=8.2-0.7$

$712\text{/}8.\text{/}2-\underset{–}{0.7}\underset{–}{7.5}$
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