Practice and Revision - Decimal Fractions
Let us practise and revise what we learned about decimal fractions. Decimal fractions represent parts of a whole using decimal notation, and
Core concept
Adding or subtracting decimals requires aligning the decimal points before performing the operation, like 3.25+1.5=4.75.
How it works
Multiplying decimals involves multiplying as whole numbers, then placing the decimal point based on total decimal places.
Why it matters
Dividing decimals often involves moving the decimal point in both numbers to make the divisor a whole number first.
Key detail
Decimal operations are used in everyday situations like calculating money, measurements, and prices with precision.
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Quick notes
• Adding/subtracting: align decimal points.
• Example: 3.25+1.5=4.75.
• Multiplying: multiply as whole numbers.
• Then place decimal based on total places.
• Dividing: make divisor a whole number first.
• Move decimal points in both numbers.
• Decimals used in money, measurements.
• This ensures precise calculations.