выполните действия
№1
1)5/7 - 3/14 + 5/28
2)5/9 - 5/12 + 1/2
№2
(2/3 + 5/8) - (1/6 + 3/4)
ответьте пж
№1
1)5/7 - 3/14 + 5/28
2)5/9 - 5/12 + 1/2
№2
(2/3 + 5/8) - (1/6 + 3/4)
ответьте пж
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Answers & Comments
№1
1) 5/7 - 3/14 + 5/28 = 20/28 - 6/28 + 5/28 = 19/28
2) 5/9 - 5/12 + 1/2 = 20/36 - 15/36 + 18/36 = 23/36
№2
(2/3 + 5/8) - (1/6 + 3/4) = (16/24 + 15/24) - (4/24 + 18/24) = 31/24 - 22/24 = 9/24 = 3/8