The general formula of division is to add and subtract directly with the same denominator, divide by different denominators first, then divide by short division, and finally simplify. Just add and subtract the same denominator directly, and divide the denominators with different denominators into the same ones. When dividing the denominator, use short division. Finally, remember to convert it into the simplest fractional type (fractional type that can't be reduced).

When you do the problem, you should also pay attention to the simplicity of operation. If there are brackets, count first, then count. If the denominator is found to be the same, shift it first (remove the brackets); If the denominator is a multiple, it's simple first. 1 can be written in many ways, which can be two-thirds, two-thirds and three-quarters.

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A general score is to divide several scores with different denominators into scores with the same mother number. For example, the scores of 1/2 and 1/3 are 3/6 and 2/6. General fraction means to change a fraction into a fraction equal to it, but with smaller numerator and denominator, which is called approximate fraction. Simplest fraction: The numerator and denominator are fractions of prime numbers, which are called simplest fraction.

A fraction whose numerator and denominator have only one common factor 1 is called simplest fraction or a fraction whose numerator and denominator are prime numbers is called simplest fraction, which is also called reduced fraction. Simplest fraction is also called reduced fraction, which can be understood as reduced fraction, that is, both numerator and denominator are prime numbers.