Выполните действия (7/15-1/6) + 2/5 (3/8-1/9) + 25/36

Question

Математика

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4 мая, 03:40

Выполните действия (7/15-1/6) + 2/5 (3/8-1/9) + 25/36

+4

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Далмат · Answer 1

(7/15 - 1/6) + 2/5 = (7*2/15*2 - 1*5/6*5) + 2*6/5*6 = (14/30 - 5/30) + 12/30 =

= 9/30 + 12/30 = 21/30 = 7/10 = 0,7

(3/8 - 1/9) + 25/36 = (3*9/8*9 - 1*8/9*8) + 25*2/36/2 = (27/72 - 8/72) + 50/72 =

= 19/72 + 50/72 = 69/72 = 23 / 24

Мисаил · Answer 2

(7/15-1/6) + 2/5 = (14/30-5/30) + 2/5=9/30+12/30=21/30=7/10=0.7

(3/8-1/9) + 25/36 = (27/72-8/72) + 25/72=19/72+50/72=69/72=23/24