1. multiplication operation
Multiplication is the first step of multiplication, addition, multiplication and subtraction. In multiplication, you need to multiply the multiplied numbers and write the product on the right side of the multiplication symbol. For example, for the formula 3×5, the result of multiplication is 15. If there are multiple multiplication operations in the formula, they need to be carried out in order of calculation.
2. Addition operation
Addition is the second step of multiplication, addition, multiplication and subtraction. In addition, you need to add up all the additions and write the sum on the right side of the plus sign. For example, for the formula 3×5+2, multiply to get 15, and then add to get 17.
3. Subtraction operation
Subtraction is the last step of multiplication, addition, multiplication and subtraction. In the subtraction operation, you need to subtract the subtraction term from the previous operation result and write the difference on the right side of the negative sign. For example, for the formula 3×5+2-4, multiply to get 15, add to get 17, and subtract to get 13.
4. Operation sequence and bracket operation
In the formula of multiplication, addition, multiplication and subtraction, it needs to be calculated from left to right according to the mathematical operation rules. If there are brackets in the formula, you need to calculate the formula in brackets first. The operations in parentheses can be performed in the order of multiplication, addition, multiplication and subtraction, and then the calculation results in parentheses are substituted into the original formula for subsequent calculation. Through the correct calculation order and bracket operation, the calculation result of the formula can be guaranteed to be correct.
To sum up, the formula of multiplication, addition, multiplication and subtraction is a mathematical formula including multiplication, addition and subtraction. In the process of calculation, it is necessary to carry out the calculation sequence according to the mathematical algorithm, first carry out the multiplication operation, and then carry out the addition and subtraction operation. If there are brackets in the formula, you need to calculate the formula in brackets first, and then substitute the calculation results in brackets into the original formula for subsequent calculation. Through the correct calculation order and operation rules, the correct result of the formula can be obtained.