Math is easy to make mistakes in the primary school graduation exam. - Training Enrollment Network

Math is easy to make mistakes in the primary school graduation exam.

At a given time, the speed of A is one sixth, that of B is one fifth and that of C is two fifths (simplified fraction).

Among them, A accounts for one sixth of 2525.

————-————=————————=————————

1 12 15: 18: 12( 15+ 18+ 12)=45

——:——:——

65 15

B accounts for one fifth: 18 18.

————-————=————————=————————

1 12 15: 18: 12( 15+ 18+ 12)=45

——:——:——

65 15

C accounts for one twelfth: 12 12.

————-————=————————=————————

1 12 15: 18: 12( 15+ 18+ 12)=45

——:——:——

65 15

Usage: 1500 * 65438+45 of 05 = 500 (pieces)

1500 * 18 45 = 600(B)

1500* 12 45=400 (C)

References:

Think with your head! ! !

Please adopt it, I find it difficult to come up with it! ! ! )

Related articles

Brief introduction of Wang Leehom.

What is the most important instrument in the first volume of fourth grade mathematics?

Ganzhou Du Yu No.4 Middle School

Is there any major in the university that you don't have to study mathematics?

Zhuhai middle school (junior high school) ranking Zhuhai middle school ranking

Give three examples of life mathematics.

1, table problem: a square table, cut off one corner, how many corners are left.

2, cut tofu problem: a piece of tofu cut three knives, can be cut

The first volume of the sixth grade Unit 2 Mathematics examination paper

Inventions and creations of scientists

Do you need math to learn accounting? Is there much room for future development? What is the lowest score in the college entrance examination?

Do you have the campaign draft for the math class representative? There is a kind of quick hair! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! No, k, you ! ! ! !