Question

Gena and her friends each estimated the quotient of –137.56 divided by –6.12 using compatible numbers. Which shows the best estimate using compatible numbers?

Answer 1

its 23

Explanation:

Answer 2

23

Explanation:

Compatible numbers : numbers that are easy to add, subtract, multiply, or divide mentally. They are close in value to the actual numbers, although they do not necessary need to be rounded numbers.

-138 is close to -137.56

-6 is close to -6.12

`\implies (-138)/(-6)`

Divide the top and bottom by -2:

`\implies (69)/(3)`

Divide the top and bottom by 3

`\implies 23`

If this is too difficult to divide mentally, you could use -140 and -7:

`\implies (-140)/(-7)`

As 2 x 7 = 14, then 20 x 7 = 140, so the answer is 20.