8, 16 plus 5, 44 times 8. 16 plus 8. 16 times 3.56.

= 15+ 1+5 =(40+4)×8 = 12+4+8 = 16×(3+0.56)

= 15+5+ 1 =40×8+4×8 =20+4 = 16×3+ 16×056

=2 1 =352 =24 =56.96

4.7 times 0.72 plus 2.8 times 0.47.

=4.7×0.72+2.8×0.47

=4.7×0.72+0.28×4.7

=4.7×(0.72+0.28)

=4.7

Problem notes need two kinds of equations and formulas.

A number is more than seven tenths of it. Find this number before 2.55.

seven

Solution: Let this number be x2.55 ÷ (1-) = 8.5.

7 10

x-____x=2.55

10

three

- x=2.55

10

x=805

What is the difference quotient of the sum of 2.2 1.8 divided by them?

(2+1.8) ÷ (2-1.8) =19 solution: let the quotient be x.

(2- 1.8)X=(2+ 1.8)

X= 19

I don't know what the symbol in the textbook is, so I use this symbol instead.

Example A* equals {A minus B] times 2, for example, 8* equals 6{8 minus 6 times 2 equals 4.

I don't know the name of the word 5.3*3. It's a double anyway. Please understand, thank you.

This way can't be done. 16*x equals 1 1 find x.

This can't be done.

Application problems are also equations.

Beibei and Lili make little red flowers. Beibei made 120 lily, 150 lily. From now on, Beibei will make 15 lilies and 12 lilies every day. How many days will two people bloom as many small red flowers?

120+15 = 135150+12 = 162. Then, find135 and162 by short division.

I sold six cans of * * * and got 1.00 yuan. A can is equivalent to the price of two beverage bottles. How much is a can? 1.6 = 1/6 yuan.

There are 40 people in a choir, of which women are more than twice as many as men. How many women are there?

Solution: If there are X male players, there are (2X+4) female players.

x+2x+4=40

3x+4=40

3x=36

x= 12

Female: 12×2+4=28 people.