For addition and subtraction with brackets within 10, we need to know the operation order in brackets first. According to the mathematical operation rules, the calculation in brackets should precede the calculation outside brackets. So for an addition and subtraction formula with brackets, we need to calculate the part in brackets first.
For example, let's calculate such an expression: 5+(8-3). First, we calculate the part in brackets, that is, 8 MINUS 3, and get 5. Then, we add 5 to this result and get 10. So the answer to this formula is 10.
The same rule applies to subtraction. For example, let us calculate the formula: 10-(4+2). First, we calculate the part in brackets, that is, 4 plus 2, and get 6. Then, we subtract this result from 10 to get 4. So, the answer to this formula is 4.
Some formulas may have many parentheses, but as long as we follow the operation order in parentheses, we can solve them correctly. For example, for 9+(5-(3+ 1)), the innermost bracket (3+ 1) can be calculated first, and then calculated outwards in turn.
Learn the skills of addition and subtraction:
1. Understand the basic concepts of addition and subtraction: addition and subtraction is one of the basic operations in mathematics, and understanding its basic concepts is the basis for learning addition and subtraction. We should understand the meaning of addition and subtraction and be able to use them for calculation.
2. Practice basic operations: To master addition and subtraction, you need to practice basic operations constantly. You can practice from simple addition and subtraction, and gradually increase the difficulty until you can perform complex operations. In practice, we should pay attention to the correctness of calculation method and the improvement of speed.
3. Mastering simple algorithms: Some addition and subtraction calculations can quickly get results through simple algorithms. For example, for some specific addition and subtraction problems, the calculation process can be simplified by rounding, decomposition and combination. Mastering these simple algorithms can solve the problem of addition and subtraction more quickly.