Subtracting Fractions with Common Denominators (ex 1) - Fraction, Arithmetic, Mathematics Video Lecture - Engineering Mathematics | Best Video for Engineering Mathematics

let's figure out what 5 / 6 5 6 minus 2
6 is minus 2 6 so one way to do is to
visualize this this is 5 6 you could
imagine 5/6 of a pie or 5/6 of a bar so
let's take a bar right over here let's
divide it into sixths so this is
dividing it into half and then each of
these will divide it into 3 so this is 3
4 5 6 so I'm gonna make it a little bit
more even so I've divided this bar into
6 chunks 5 6 would be five of these so 1
2 3 4 5 that's 5 6 from that we're going
to subtract to 6 so we're going to get
rid of we're gonna get rid of this one
right over here and we're gonna get rid
of this 1 right over here we're gonna
get rid of two of them and so what are
we left with we're left with three of
the six so we are left with three of the
sixth and oh another way to think about
it is our denominator stayed the same we
actually have to have the same
denominator add or subtract fractions
and then we subtracted the numerators 5
6 minus 2 6 5 minus 2 is 3 and then this
can actually be simplified 3 over 6 is
exactly half of the pieces and we can
see that by dividing the numerator and
the denominator by 3 since they're both
are divisible by 3 so this becomes 1 and
this becomes 2 we have half of the
pieces left