Question

Find the sum of 4 and 2/5 and 3 and 5/6. Enter your answer as a reduced mixed number or as a whole number.

Answer 1

Well, there are two ways to do this, but the easiest way, probably is to first add the whole-number components. And then add the fractional components.

Answer 2

How do i do that?

Answer 3

Then what?

Answer 4

Add.

Answer 5

Igot 7 and 7/11

Answer 6

Made a typo... sorry, let me revise
\[\huge 4\frac25+3\frac56=4+3+\frac25+\frac56\]

Answer 7

How do you add fractions?

Answer 8

I don't know? I still got 7 and 7/11

Answer 9

You can only add fractions with the same denominator. If they don't have the same denominator, you have to make it so... using their least common multiple.
Now
\[\large \frac25+\frac56\]
the denominators are 5 and 6. What is their LCM?

Answer 10

How would I get the LCM?

Answer 11

Normally, you have to list down their multiples and manually find the least multiple that is common to both of them, but that's strenuous.
Prime factorisation works, you factor them completely into primes, and multiply them, but take all common factors only once.

But I'll let your teacher teach you that. Here's a neat trick, the LCM of any two consecutive positive numbers (integers) is always their product.

Answer 12

Can you help me with the LCD?

Answer 13

I told you... 5 and 6 are consecutive, their LCD is just their product.

Answer 14

ok the LCM is 1

Answer 15

How did you get 1?

Answer 16

5 times 1 and 6 times 1 so 1 can go into 1

Answer 17

This thread makes me wanna go get some popcorn and a coke...

Answer 18

wow really I need help

Answer 19

terenzreignz 1 can go into both 5 and 6

Answer 20

Hint: "1" is NOT the product of 5 and 6.

But I don't want to hijack terenzreignz instructions to you, so I'll say no more.

Answer 21

qweqwe123123123123111 its okay you can help me too

Answer 22

How would you add 1/2 and 1/4 ?

Answer 23

I don't know

Answer 24

You have 2 denominators here. 1/2 has 2 as the denominator and 1/4 has 4 as the denominator.

Do you see that?

Answer 25

Sorry, I was called away... what did I miss?

Answer 26

yes I see that but I need help math is really hard for me

Answer 27

how do I find the LCM

Answer 28

Oh, an example. Goody. @Rikiamyers to give you an idea... this is one half (1/2)