2. The reciprocal of an integer. Integer as denominator, 1 as numerator. Is the reciprocal of an integer.
3, the reciprocal of the decimal. For the reciprocal of divisible number, you can divide by 1 to find the reciprocal, for uncountable number, convert the component number, and then find the reciprocal according to the method of true and false fraction.
4, and the reciprocal of the score. First, turn the fraction into a false fraction, then switch the numerator and denominator, which is the reciprocal of the number.