Question

Kevin estimated the difference of 7/8 - 3/6 to be 0. is his estimate reasonable? explain

Answer 1

No because without estimation we get an answer of,

`(3)/(8)`
A better estimation would be,

`(1)/(2)`
Considering 7/8 is close to 8/8 which is 1
And 3/6=1/2

`1 - (1)/(2) = (1)/(2)`

Answer 2

you need to find a common denominator which you get by multiplying denominators. 6/6 *7/8-3/6 *8/8 = 42/48 - 24/48 and then subtract across which gives you 42-24 =18