First, review and improve.

Symbolic representation number

decimal

Second, the decimal multiplication and division method

Decimal times integer

Decimal times decimal

Multiplication, multiplication and addition, multiplication and subtraction

The law of integer multiplication is extended to decimals.

Divider is a fractional division of integers.

This number is the division of decimals.

repeating decimal

Calculate with a calculator

Rounding up product sum quotient

Third, statistics.

average number

Calculation of average value

Application of average value

Four, simple equation (a)

Use letters to represent numbers.

Simplification and evaluation

equation

Solving application problems by solving equations of equal relation sequence

Five, geometry exercises

parallelogram

Area of parallelogram

Area of triangle

trapeziform

Trapezoidal area

Six, finishing and improving

Decimal elementary arithmetic

Water, electricity and natural gas costs-decimal application

problem solving

Graphic area

Math Square-Calculation of Time

Mathematical square coding