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Year4 Math
任务 60：The Commutative and Associative Properties of Addition
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任务 List
任务 1：Understanding Capacity
任务 2：Understanding Volume Units：Liters and Milliliters
任务 3：Exercise 0ne
任务 4：Exercise Two
任务 5：Division(1)
任务 6：Exercise 0ne
任务 7：Division(2)
任务 8：Exercise Two
任务 9：Division (3)
任务 10：Review
任务 11：Observing objects from different perspectives
任务 12：Placing rectangular or cubic objects
任务 13：Exercise 0ne
任务 14：Exercise Two
任务 15：Simple table and bar chart
任务 16：Exercise 0ne
任务 17：Data Analysis
任务 18：Exercise Two
任务 19：Average
任务 20：Exercise Three
任务 21：probability and events (1)
任务 22：probability and events (2)
任务 23：Exercise 0ne
任务 24：Exercise Two
任务 25：Mixed operations without brackets
任务 26：Mixed operations with round brackets
任务 27：Mixed operations with square brackets
任务 28：Exercise 0ne
任务 29：Exercise Two
任务 30：Exercise Three
任务 31：Understanding Lines and Angles
任务 32：Measurement, classification, and drawing of angles
任务 33：Perpendicular and Parallel
任务 34：Exercise 0ne
任务 35：Exercise Two
任务 36：Exercise Three
任务 37：Review
任务 38：Translation of the figure
任务 39：Rotation of a figure
任务 40：Axial symmetric figure
任务 41：Exercise 0ne
任务 42：Understanding numbers with ten thousand
任务 43：Big numbers
任务 44：Comparison and rewriting of numbers
任务 45：Exercise 0ne
任务 46：Vertical multiplication of a three-digit number by a two-digit number
任务 47：Applications in daily life
任务 48：Special patterns
任务 49：Simplified calculation of multiplication with zeros at the end of the multiplier
任务 50：Exercise 0ne
任务 51：Exercise Two
任务 52：Exercise Three
任务 53：Understanding and Using a Calculator
任务 54：Explore patterns using a calculator
任务 55：Exercise 0ne
任务 56：Exercise Two
任务 57：Draw a line segment diagram to solve the problem
任务 58：Draw a diagram to solve the problem
任务 59：Exercise 0ne
任务 60：The Commutative and Associative Properties of Addition
任务 61：The Commutative, Associative, and Distributive Properties of Multiplication
任务 62：Problems of encounter
任务 63：Exercise 0ne
任务 64：Exercise Two
任务 65：Exercise Three
任务 66：Understanding triangles
任务 67：Understanding parallelograms
任务 68：Understanding trapezoids
任务 69：Exercise 0ne
任务 70：Exercise Two
任务 71：Exercise Three
任务 72：Determine position using coordinate pairs（1）
任务 73：Determine position using coordinate pairs（2）
任务 74：Exercise 0ne
