Note that the 0 after the decimal point of the product should be crossed out, and the product with insufficient decimal places should be filled with 0. The changing law of products.
Learn estimation methods and develop estimation habits.
Learn approximate methods of products and solve practical problems.
Master the operation order of decimal elementary arithmetic, and can correctly calculate mixed decimal expressions.
The decimal multiplication problem can be calculated by using the algorithm and operation properties, which makes the calculation simple.
Broaden the thinking of solving problems and flexibly use various methods to solve problems.
Master the calculation method of divisor is integer and divisor is decimal, and calculate it correctly.
Continue to learn fractional division and consolidate the calculation rules of fractional division.
Master the method of using "rounding method" to find the approximate value of quotient as decimal.
Master the concepts of cyclic decimal and cyclic knot, their simple notation and the approximate value of cyclic decimal.
Master the general methods and steps to solve application problems, and be able to solve application problems in three consecutive steps.
Master the methods of solving application problems by using open questions, results, methods and strategies.
Understand the characteristics of parallelogram and form the concept of parallelogram; Understand the characteristics of parallelogram and its application in practice.
By mastering the formula for calculating the parallelogram area, we can correctly calculate the parallelogram area by using the formula.
Know the characteristics of trapezoid, abstract the concept of trapezoid, know the names of various parts of trapezoid, and know right-angled trapezoid and isosceles trapezoid.
Master the formula and method of calculating trapezoidal area, and use the formula to calculate trapezoidal area correctly.
Learn to master the characteristics of triangle, abstract the concept of triangle and understand the application of triangle in practice.
Mastering the calculation method of triangle area can correctly calculate the area of triangle and solve practical problems.
Experience the possibility of an event, estimate the size of the possibility and design some simple games according to the given possibility.
Understand the meaning and function of using letters to represent numbers, and use letters to represent common quantitative relations and learned operational rules.
Further understand the meaning and function of using letters to represent numbers, and use internal letters to represent common quantitative relations and learned calculation formulas.
Understand the concept of equality, the nature of equality, equation and its solution, and know the solution and test method of simple equation. Sequential equations can solve relatively simple problems.
A further understanding of concepts such as equality and equations can help us to correctly solve and test the equations and list them to solve practical problems.
Can skillfully solve equations, consciously test, master the general method of using equations to solve application problems.