name the multiplication inverse, or reciprocal of each number.

5.4 - 4x1/4=4/1=1
6.7 - 7x1/7=1/7=1
7.2/5 - 2/5x5/2=1
8.7/16 - 7/16x16/7=7/16x/7/=1

To find the multiplication inverse or reciprocal of a number, you need to divide 1 by that number.

1. For 5.4:
To find its reciprocal, divide 1 by 5.4:
Reciprocal of 5.4 = 1/5.4

2. For 6.7:
To find its reciprocal, divide 1 by 6.7:
Reciprocal of 6.7 = 1/6.7

3. For 7.2/5:
To find its reciprocal, you need to invert the fraction by swapping the numerator and denominator:
Reciprocal of 7.2/5 = 5/7.2

4. For 8.7/16:
To find its reciprocal, you need to invert the fraction by swapping the numerator and denominator:
Reciprocal of 8.7/16 = 16/8.7

Please note that for some numbers, like 1, their reciprocals are the same as the original number itself, as dividing 1 by 1 results in 1.