Solving equations is the highlight of fifth-grade mathematics and the starting point of junior high algebra. This 100-question equation exercise progresses from the basic type to the bracketed type, with detailed problem solving steps, and the child can master it according to the practice.
Equations are a key step in mathematics from “arithmetic” to “algebra”. The common problem for fifth-grade children in their first contact with the equation is: they do not know whether to add or subtract items on both sides of the equals sign, and if the solution is not checked. This exercise is progressively designed according to the type of question, and takes you step by step to get started.
Solve the kernel law of the equation
If both sides of the equation add or subtract the same number at the same time, the equation still holds; if both sides multiply or divide by the same number that is not 0, the equation still holds. Solving the equation is to use this property to leave x alone.
Problem solving steps
- Write the word “understanding:”, x is placed on the left;
- Move the item: leave the item with x on the left and move the number to the right (move the item to change the sign);
- Consolidation: Consolidation of items of the same type;
- The conversion coefficient is 1: the coefficient of both sides divided by x at the same time;
- Verification: Return the answer to the original equation for verification.
Faulty Points
① Change the item and forget the change sign: + change -, – change +; ② break the brackets first with brackets (using the law of multiplication distribution); ③ complete the calculation without testing – testing is the last line of defense against careless errors. Solve 5 times a day, and the equation will stabilize in a month.
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