12× 5/6 – 2/9 ×3?

8× 5/4 + 1/4?

6÷ 3/8 – 3/8 ÷6?

4/7 × 5/9 + 3/7 × 5/9?

5/2 -( 3/2 + 4/5 )?

7/8 + ( 1/8 + 1/9 )?

9 × 5/6 + 5/6?

3/4 × 8/9 - 1/3?

7 × 5/49 + 3/ 14?

6 ×( 1/2 + 2/3 )?

8 × 4/5 + 8 × 1 1/5?

3 1 × 5/6 – 5/6?

9/7 - ( 2/7 – 10/2 1 )?

5/9 × 18 – 14 × 2/7?

4/5 × 25/ 16 + 2/3 × 3/4?

14 × 8/7 – 5/6 × 12/ 15?

17/32 – 3/4 × 9/24

Algorithm of fractional multiplication:

When a fraction is multiplied by an integer, the numerator is the product of the numerator of the fraction multiplied by the integer, and the denominator remains unchanged. (If you can subtract points, subtract points in the calculation first. )

Fractions are multiplied by fractions, with the product of numerator multiplication as numerator and the product of denominator multiplication as denominator. The quotation that can be lowered becomes the simplest score (in calculation).

But numerator and denominator cannot be zero.

What can be reduced must be reduced first, and then calculated.

Meaning:

Fractional multiplication of integers, like integer multiplication, is a simple operation to find the sum of several identical addends. Multiplying a number by a fraction can be regarded as finding a fraction of this number.