Question

they asking me to find the answer by using compatible numbers 9÷ 5,138 9 and ? are compatible. the estimate is?

Answer 1

Now, 9 and 51 are not compatible because 51 cannot divide 9 without a remaider.

The compatible number with 9 that is close to 51 is 54.

Hence,

9 and 54 are compatible.

This will give us

`(5400)/(9)=600`

Hence,

The estimate is 600