Whole hundred times two digits, three digits times ten digits, three digits times two digits, and three digits times two digits.
Two. L and ml
Understand the unit conversion of liters and milliliters, liters and milliliters.
● Practical activities: wonderful "cup piano"
Three. triangle
To understand a triangle, the sum of two sides of a triangle is greater than the third side, the classification of triangles, and the sum of internal angles of triangles, isosceles triangles and equilateral triangles.
4. Mixed operation
Three-step calculation problems without brackets, three-step calculation problems with brackets and three-step calculation problems with brackets, and comprehensive formulas for solving practical problems of simple three-step calculation problems.
Verbs (abbreviation for verb) parallelogram and trapezoid
Understanding of parallelogram, trapezoid and isosceles trapezoid.
Operation rules of intransitive verbs
Multiplication distribution law, the application of multiplication distribution law for simple calculation.
● Practical activities: We go for a spring outing.
7. Find a pattern
Explore simple collocation rules and use them for orderly arrangement.
Eight. Symmetry, translation and rotation
The symmetry axis of an axisymmetric figure, draw an axisymmetric figure on the grid paper, translate and rotate the figure, translate or rotate the simple figure 90 degrees on the grid paper, and design the pattern on the grid paper through translation, symmetry and rotation.
● Practical activities: appreciation and design of patterns.
Nine. Multiplication sum factor
The understanding of multiples, factors, odd numbers, even numbers, prime numbers and composite numbers, and the characteristics of multiples of 2, 5 and 3.
10. Explore the law with a calculator
Explore the law of product change, explore the law of quotient invariance, and apply the law of product sum change and quotient invariance to make simple calculations.
XI。 statistics
Simple broken line statistical chart
● Practical activities: Understand our living space.
Twelve. Numbering by letters
Use letters to represent numbers, use letters to represent calculation formulas, and use letters to represent quantitative relations.
Thirteen. Strategies for solving problems
It is used as a graphic method to solve the practical problems of finding distance in travel problems and related practical problems. Has it changed now? I'm not sure.