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add (-1/3)+(-2/7)+(4/9)
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@LoveYou*69 @Easyaspi314 @FutureMathProfessor
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You have denominators of 3,7,9. You need the LCD. What number will be the LCD?
63
@mathnoobie10 @mathstudent55 @mathkid1
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correct
Let's change all fractions to a denominator of 63.
ok
21/63 9/63 7/63
1/3 = 21/63 2/7 = 18/63 4/9 = 28/63 So, you have -21/63 -18/63 + 28/63 = -11/63 Agree?
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how did you get 18/63 and 28/63 ????
For 4/....9 into 63 goes 7 times, and 7 times 4 is 28.
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