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Mathematics 7 Online
FriskIsNice:

Can someone help me? -3/2 - 3/8 = ? I understand fractions may be easy to some people, but it’s not easy to me, please help πŸ€žπŸ»πŸ™πŸΌπŸ™πŸΌπŸ™πŸΌπŸ™πŸΌπŸ™πŸΌπŸ™πŸΌ

remi2019:

i Know the answer but i dont know how to explain it

Angle:

Hello @FriskIsNice When we are working with Adding OR Subtracting fractions, we want to make sure that our fractions have a Common Denominator Do you know what that common denominator might be in this case?

remi2019:

so basically try to find a common denominator

FriskIsNice:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Angle Hello @FriskIsNice When we are working with Adding OR Subtracting fractions, we want to make sure that our fractions have a Common Denominator Do you know what that common denominator might be in this case? \(\color{#0cbb34}{\text{End of Quote}}\) I believe 4?

Angle:

not quite

Angle:

We are looking for something called the "Least Common Multiple" of 2 and 8

remi2019:

no because it can NOT be smaller than a denominator so it would be ...

FriskIsNice:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Angle We are looking for something called the "Least Common Multiple" of 2 and 8 \(\color{#0cbb34}{\text{End of Quote}}\) Ohhhhhh, wouldn’t it be 2 then, since 2 goes into 2 once and 2 goes into 8 4 times!

Angle:

Here's one way to find the Least Common Multiple: - write out the multiples of the numbers you are given until you come across a multiple that they have in common The multiples of 2 are: 2, 4, 6, 8, etc

Angle:

Other way around :) The Least Common Multiple would be 8 because 2 goes into 8 four times

FriskIsNice:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Angle Other way around :) The Least Common Multiple would be 8 because 2 goes into 8 four times \(\color{#0cbb34}{\text{End of Quote}}\) Ohhhhhh. So I multiply 8 from the bottom to the top, cause what you do to the bottom you do to the top?

Angle:

close! you multiply the. 3/2 by four on the bottom and top because 2 went into the 8 four times

FriskIsNice:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Angle close! you multiply the. 3/2 by four on the bottom and top because 2 went into the 8 four times \(\color{#0cbb34}{\text{End of Quote}}\) Okay, so I would multiply 8 by 3 and multiply 8 by 2. Sorry if I’m constantly repeating myself.

Angle:

nonono we're multiplying by 4

Angle:

because 2 went into 8. FOUR times

FriskIsNice:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Angle nonono we're multiplying by 4 \(\color{#0cbb34}{\text{End of Quote}}\) Oof sorry, I’m not that good in finding things πŸ˜… especially since I don’t have my glasses on but I lost em

Angle:

cool so 3 x 4 = ? -- 2 x 4 = ?

FriskIsNice:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Angle cool so 3 x 4 = ? -- 2 x 4 = ? \(\color{#0cbb34}{\text{End of Quote}}\) 4 x 3 = 12 2 x 4 = 8 3 x 4= 12 β€”β€”β€” β€”- 2 x 4 = 8

Angle:

PERFECT So now we have a situation that looks like this |dw:1613010156858:dw|

Angle:

now that the denominators look the same, we just have to to the math on the top what is. -12 - 3 = ?

Bea2006:

hehe -15

Angle:

ok, put that number back on top of the 8 what's your fraction?

Bea2006:

ik the answer :)

Angle:

@Bea2006 The point is to guide people to their answers so that they can actually learn something along the way. Not to hand them the results.

FriskIsNice:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Angle now that the denominators look the same, we just have to to the math on the top what is. -12 - 3 = ? \(\color{#0cbb34}{\text{End of Quote}}\) Something like this?

Angle:

You got it @FriskIsNice !

FriskIsNice:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Angle You got it @FriskIsNice ! \(\color{#0cbb34}{\text{End of Quote}}\) Okay! Thank you so much! Means a lot!πŸ™πŸΌπŸ˜

Bea2006:

\(\color{#0cbb34}{\text{Originally Posted by}}\) @Angle @Bea2006 The point is to guide people to their answers so that they can actually learn something along the way. Not to hand them the results. \(\color{#0cbb34}{\text{End of Quote}}\) but i didnt say the answer-

Angle:

yeah, I just wanted to make it clear - I've had plenty of people interrupt me before with blurting out an answer

Bea2006:

oh-

FriskIsNice:

That’s being rude in my book.

Bea2006:

how?

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