Master the algorithm skillfully. There is no other good way to learn rational number subtraction, which is to master the algorithm skillfully. The subtraction of rational numbers is to subtract a number, which is equivalent to adding the reciprocal of this number. As long as you remember this algorithm, you can subtract rational numbers. For beginners of rational number subtraction, it may be difficult, but more practice will improve the calculation ability and ensure the accuracy of calculation.
It can be represented by a number axis. If you want to learn rational number subtraction well, you must learn to express it with the number axis. Some students are prone to confusion when learning rational number subtraction. In this case, it can be calculated by the number axis representation, which can help students better understand the algorithm of rational number subtraction. Using the number axis to represent the subtraction of rational numbers will enable students to correctly understand and use the algorithm of rational number subtraction.
Learn how to convert subtraction into addition. Rational number subtraction can't. Only when the subtraction of rational numbers is converted into addition can the next calculation be carried out. To remember that one, subtracting a number is equivalent to adding the inverse of this number. Be sure to add symbols correctly when calculating. Rational number subtraction is to convert subtraction into addition, which will be easy to do.
Be careful when making the conversion, and pay attention to adding brackets and subtracting brackets. When doing rational number subtraction, you must be careful when converting, and you must not be careless. Remember the arithmetic of rational number subtraction, add the inverse of a number, and remember to put brackets. At the same time, we should also find out whether this symbol is positive or negative. Remember another point, when changing symbols, both symbols should change at the same time. If only one symbol is changed, an error will occur.