—=—=—=—=— —=—=—= — = —

5 15(25)30(45) 20(5) 10 40 ( 100)

3 3 ×( 3 )( 9 ) 15 15÷( 3 )( 5 )

—=————=———— — = ————=———

5 5×3 15 24 24÷3 ( 8 )

4 ×( 4 ) 24 ÷( 4 )

4 ( 16 ) 24 ( 6 )

—=—————=——— —=—————=———

6 6×( 4 ) 24 28 28 ÷( 4 ) 7

three

A fraction whose denominator is greater than the numerator 15, equal to-. What is the score?

eight

15/(8-3)=3 This score is

3×3 9

——=——

8×3 24

Choose six of the nine numbers (1~9) to form three equal parts, and each number can only be used once.

( 1 ) ( 3 ) ( 4 )

————=————=————

( 2 ) ( 6 ) ( 8 )

First of all, the approximate score

15 9 12 36 18 36

— — — — — —

24 12 15 60 30 48

be qualified for sth

5 3 4 3 3 3

- - - - - -

8 4 5 5 5 4

Second, the following is not about the simplest score becoming the simplest score.

20 10 68 34 30 6 26 13

—=— —=— —=— —=—

36 18 102 5 1 75 15 78 39

be qualified for sth

5 2 2 1

- - - -

9 3 5 3

Three. 5 1

Add a number to the numerator and denominator of a fraction to reduce the fraction. What are the numbers added at the same time?

13 2

( 13-5)×2- 13=3

five

For a fraction, the numerator plus the mother is equal to 168, and the numerator and denominator are each reduced by 6, then the fraction becomes-the original fraction.

seven

What is the number?

( 168-6×2)÷(5+7)= 13

The initial score is

5× 13+6 7 1

————=——

7× 13+6 97

Please write down the lowest common denominator of each group of scores first, and then turn it into the same denominator.

1、

1 3

The lowest common denominator of sum is (12)

3 4

1 1 ×( 4 )( 4 )

—= —————=————

3 3 ×( 4 )( 12 )

3 3 × ( 3 )( 9 )

—=——————=————

4 4 × ( 3 )( 12 )