8 yuan for each adult and four yuan for children. What does the formula 8×7-5 mean?

the meaning of the formula of 5-4× 8.

for example:

5-4x9=5-36=14 yuan

8x2+4=16+4=2 yuan

A: 14 yuan should be found, and three people should be ***2 yuan.

addition:?

operation of combining two numbers into one number/operation of combining two decimals into one decimal number/operation of combining two fractions into one fraction subtraction: operation of finding the other addend when the sum of two addends and one of them are known.

multiplication:

a simple operation to find the sum of several identical addends. The meaning of decimal multiplication by integer is the same as that of integer multiplication. Multiplying a number by a pure decimal means finding a few tenths and a few percent of this number ... The meaning of multiplying a fraction by an integer is the same as that of integer multiplication.

division:?

the operation of finding the other factor by knowing the product of two factors and one of them. It has the same meaning as integer division.