| Category | Format | Size |
|---|---|---|
| Hebei Education Edition Sixth Grade Mathematics Volume 2 | pptx | 6 MB |
"Review of Fractions and Percents" PPT
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"Review of Fractions and Percents" PPT
Part One: Fractions and Percents
1. The meaning of fractions and fraction units
Unit "1"----An object, a unit of measurement or a whole composed of many objects can be represented by the natural number 1. Usually we call it unit "1".
Fraction - Divide the unit "1" evenly into several parts, and the number representing such one or several parts is called a fraction.
Fraction unit - divide the unit "1" evenly into several parts, indicating the number of one part.
Names of the parts of the fraction:
Numerator (indicates the number of parts taken)
score line
Denominator (the number of parts representing the average score)
2. Fractions and division
The relationship between fractions and division:
dividend ÷ divisor = dividend / divisor (divisor ≠ 0)
a÷b=a/b(b≠0)
3. Comparison of fraction sizes
★For two fractions with the same denominator, the fraction with the larger numerator is larger.
★For two fractions with the same numerator, the fraction with the smaller denominator is larger.
★Common fraction: First find the lowest common multiple of the original denominators, and then convert each fraction into a fraction using the lowest common multiple as the denominator.
8.The meaning of percentages
A number that expresses what percentage of another number a number is called a percentage. Percentage is also called percentage or percentage.
The unit name cannot be followed by the percentage.
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Update Time: 2024-07-01
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