"The Meaning of Ratio" Ratio and Proportional Distribution PPT Courseware

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"The Meaning of Ratio" Ratio and Proportional Distribution PPT Courseware

Do you still remember the differences and connections between fractions and division?

The dividend is the numerator of the fraction, and the divisor is the denominator of the fraction.

dividend ÷ divisor = dividend / divisor

a÷b=a/b (b≠0)

In the two calculation formulas 15÷10 and 10÷15, sometimes we also describe the relationship between these two quantities as:

The ratio of length to width is 15:10,

The ratio of width to length is 10:15.

Note: When comparing two quantities, you must clarify who is comparing with whom, who is in front and who is behind. You cannot reverse the positions casually, otherwise the specific meaning of the ratio will change.

15 to 10 15 : 10

10 to 15 10 : 15

10:15

":" is the ratio sign, pronounced as "bi" (the ratio sign is separated from the division sign, remove the line in the middle of the division sign, and the remaining two points are the "bi sign". When writing the ratio sign Please note that the upper and lower points are aligned and written in the middle of the two numbers. It is different from the colon.)

Rewrite the following ratios as fractions.

21:100 32:15

There are 3 basketballs and 4 footballs. Write the ratio of the number of basketballs to footballs, write the ratio of footballs to basketballs, and find the ratios respectively.

Basketball : Football = 3 : 4 =

judge:

(1) The long jump score of Xiao Gang in sixth grade is 2 meters, and the long jump score of Xiao Ming in third grade is 110 centimeters. Their score ratio is 2:110. ( )

(2) For the 1500-meter long-distance race, Wang Cheng took 6 minutes and Zhang Jing took 8 minutes. Their speed ratio is 6:8 ( )

1. Ratio expresses the relationship between two quantities and is the comparison of two numbers. Division is an operation. A fraction is a number.

2. Ratio is a number, which is the quotient obtained by dividing the former term of the ratio by the latter term. It is usually expressed as a fraction. The ratio must represent the two numbers being compared, such as 24 to 12. It can also be written in fraction form but not as a fraction. It cannot be converted into a mixed number or an integer, and it cannot be read as a fraction.

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"The Meaning of Ratio" Ratio and Proportional Distribution PPT Courseware 2:

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"The Meaning of Ratio" PPT courseware on understanding ratios. 2 to 3 is recorded as 2:3; 3 to 2 is recorded as 3:2. ∶ is the ratio sign. The number before the ratio sign is called the antecedent term of the ratio, and the number after the ratio sign is called the consequent term of the ratio. Consider 1 part of the detergent in each solution and how many parts of water can be considered? return..

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Update Time: 2024-12-03

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