Question

4.By what number should we multiply 9 to get 1? ​

Answer 1

1/9 here is the answer

Step-by-step explanation:

9×1/9 =9/9=1

Answer 2

if we multiply a number by its multiplicative inverse ,the product is always one

If a is the number,it's multiplicative inverse is 1/a such that a*(1/a)=1

If a is a negative number,it's multiplicative inverse is -1/a such that (-a)*(-1/a)=1

Multiplicative inverse of —4/9 is—9/4, such that

(-4/9)(—9/4)=1