Dig a canal with a length of165m, and dig 5m every day. If the project starts on July 28th, when will it be completed? What is the formula?

Dig a canal with a length of165m, and dig 5m every day. If the project starts on July 28th, it will be completed on August 30th.

Reason: According to the formula, 135780 wax never goes bad within thirty-one days, thirty winters in forty-six years, one in February 28th in a normal year and one in a leap year. So, 165? 5=33, if there are 365,438+0 days in July, 365,438+0 days in August, 365,438+0-28 = 3, 33-3=30, it will be completed on August 30th.

Extended data:

In mathematics, formula refers to the formula listed in the calculation of numbers (or algebraic expressions), including numbers and operation symbols (four operations, power, root, factorial, permutation and combination, etc. ). According to the different calculation methods, the formulas are generally divided into horizontal and vertical. Different from expressions, expressions are meaningful formulas that connect data of the same type with operation symbols according to certain rules.

Definition:

1, and the equation that contains the equal sign "=" and represents the equality relationship is the equation/formula.

2. Formulas formed by connecting numbers with operation symbols. For example, 5×2÷( 10-9)= 10.