30%x=90 X+20%=40 5X-0.7*3=6.6

Five tenths of 65438+0: x = 5 x-25% x =1519.6-70% x = 5.60.2x =15 2x30%.

5/8 x = 25

Two. solve problems

1 .80% of a number is 80. What are three quarters of this figure?

2. The powder yield is 80%. How many kilograms of wheat does 320 kilograms of flour need?

This shop brought 900 kilograms of apples, which is 20% heavier than pears. How many kilograms of pears and apples were shipped?

4. A story book with a page of 120. On the first day, I read all 25%, on the second day, all 35%. On the third day, which page did you start reading? Let me help him answer +20% = 40 5x-0.7 * 3 = 6.6.

Solution x = 90 ÷ 30% solution x = 40-20% solution 5x-2. 1=6.6.

x = 90÷0.3 x = 40-0.2 5x = 6.6+2. 1

x=300 x=39.8 5x=8.7

x=8.7/5

x= 1.74

1, solution: 80 ÷ 80 %× 3/4 = 752, solution: 320 ÷ 80% = 400 kg 3,900+900 ÷ (1+20%) =1.

A: A:

4. 120×(25%+35%)+ 1 = 73(page)A: