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15/18 + 1/2 - 1/3 - 2/6=
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15/18 + 1/2 - 1/3 - 2/6=

User Nicholas Hart
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2 Answers

3 votes
mmc: 18

15/18 + 1/2 - 1/3 - 2/6 =


18 / 18 = 1... 1x15= 15 -----> 15/18
18 / 2 = 9... 9x1= 9 -------> 9/18
18 / 3 = 6... 6x1= 6 -------> 6/18
18 / 6 = 3... 3x2= 6 -------> 6/18

15/18 + 9/18 + 6/18 + 6/18 = 36/18= 2
User Kudos
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8.5k points
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(15)/(18)+(1)/(2)-(1)/(3)-(2)/(6)=(5)/(6)+(1)/(2)-(1)/(3)-(1)/(3)=(5)/(6)+(1)/(2)-(2)/(3)=(*)\\\\LCD((5)/(6);\ (1)/(2);\ (2)/(3))=6\\\\(1)/(2)=(3)/(6);\ (2)/(3)=(4)/(6)\\\\(*)=(5)/(6)+(3)/(6)-(4)/(6)=(5+3-4)/(6)=(4)/(6)=(2)/(3)
User Yes
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