How do you add 1/3+1/913+19?

2 Answers
Aug 12, 2016

Take the larger of the two numbers in the denominator and then use addition for each term.

Explanation:

1/3 + 1/9 = (3+1)/9 = 4/9.13+19=3+19=49.

You add the multiples for the numerator.

Aug 14, 2016

4/949

A fuller explanation about method given.

Explanation:

color(blue)("2 very important facts about fraction")2 very important facts about fraction

color(red)("Fact 1")Fact 1

You can not ul("directly") add or subtract fractions top numbers (numerators) unless the bottom numbers (denominators) are the same.

Consider:

("numerator")/("denominator")->("count")/("size indicator of what you are counting")

1/2 you have a count of 1 but it takes 2 of what you are counting
color(white)(....)to make a whole of something (all of it).

2/5 you have a count of 2 but it takes 5 of what you are counting
color(white)(....)to make a whole of something (all of it).

'...........................................................................................................
color(white)(.)

color(red)("Fact 2")

Multiply by 1 and you do not change the intrinsic value.

Multiply by 1 in another form and you can change the way a fraction looks without changing its intrinsic value.
'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
color(blue)("Answering your question")

Given:" "1/3+1/9

Multiply 1/3 by 1 but in the form of 1=3/3

color(brown)( (1/3xx1)+1/9 color(blue)(" "=" "(1/3xx3/3)+ 1/9
color(white)(.)

(1xx3)/(3xx3)+1/9" "=" "3/9+1/9" " =" " 4/9