The property used in the equation 7 x 1.7 = 1/7 + 7 = 1 is the multiplicative inverse property.
This property states that for any non-zero number a, its multiplicative inverse is 1/a. In other words, a x 1/a = 1.
In the given equation, we have:
1/7 is the multiplicative inverse of 7
7 x 1/7 = 7 x (1/7) = 1
Therefore, the equation holds true because of the multiplicative inverse property.
Complete question:
Name the property used 7 x 1.7 is equal to 1 upon 7 + 7 is equal to 1.