Fractional multiplication is a mathematical operation method. The numerator of the fraction is multiplied by the numerator and the denominator is multiplied by the denominator. If you can subtract, you must subtract first, and the numerator cannot be multiplied by the denominator. When doing the first step, we should think about whether the numerator of one number and the denominator of another number can be reduced. (except 0)

Multiplying a fraction by an integer is to add up multiple identical numbers, for example? X2 means two? Add it up? X 10 means 10? Add it up. If the integer is multiplied by the fraction: the integer is multiplied by the numerator, not the denominator (both integer and denominator can subtract a fraction). Here, multiplying a number by a fraction means finding a fraction of this number.