Large number = decimal+difference or: large number = decimal × multiple.
The problem of difference multiple refers to finding two numbers separately when the multiple relationship between two numbers (usually two numbers) and their differences is known.
Think about solving problems:
(1) Draw a line graph according to the meaning of the question.
(2) Find out the difference and multiple relationship between two numbers. In some questions, the relationship between difference and multiple is not directly given, so we should first find the difference and multiple; In some questions, two numbers themselves do not satisfy the multiple relationship, and they need to be increased or decreased to satisfy the multiple relationship.
(3) Solve by formula.
Sum-difference multiple formula
The formula of 1, and the problem of difference times.
(sum+difference) ÷ 2 = large number
(sum and difference) ÷ 2 = decimal
2, and the problem of the times
Sum \ (multiple-1) = decimal
Decimal × multiple = large number
(or sum-decimal = large number)