Skills in Rational Number Operations

Abstract

For the operation of rational numbers, we must not only master the algorithm, but also be able to master the operation skills flexibly according to the characteristics of the purpose. Some problems are calculated according to the conventional method, the process is more complicated and error-prone. However, the use of skills can make the calculation Process simplification and reduce errors. Below are some commonly used techniques for your reference. 1. Skillfully use the law of addition. To add several rational numbers, first add the numbers of the same sign together, and then add the resulting numbers together. 2. Add the numbers that add up to zero. 3. Add the numbers that have the same denominator, that are easy to divide, or that add up to an integer. 4. Add several rational numbers. If the addend is a fraction, then sometimes the fraction is written in the form of the sum of an integer and a fraction, and then the integer and the integer are added together. It is easier to combine the fraction and the fraction. . 2. Skillfully use the law or properties of multiplication. Use the commutative and associative laws of multiplication. 2. Use skillfully