The basic formula of this application problem is:

Decimal = and present (multiple+1). In the formula, the number "1 time" represents a decimal.

Large number = and-decimal, or large number = decimal × multiple.

For example, the sum of a large number and a decimal number is 265, and the large number is four times the decimal number. What are big numbers and small numbers?

Solution: According to the above formula, we can get the following large and decimal numbers.

Decimal = 265 ÷ (4+ 1) = 53, large number = 265-53 = 2 12 or 53× 4 = 2 12.