ответ: 42/9-13/6=3.3
Пошаговое обеснение 42/9=4.6
13/6=2.1
4.6-2.1=2.5
Пошаговое объяснение:
42/9 - 13/6 = (42*2)/(9*2) - (13*3)/(6*3) =
84/18 - 39/18 = (84-39)/18 = 45/18 = (45:9)/(18:9) = 5/2 = 2 1/2
или:
42/9 - 13/6 = 4 6/9 - 2 1/6 = 4 12/18 - 2 3/18 =
2 9/18 = 2 1/2
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ответ: 42/9-13/6=3.3
Пошаговое обеснение 42/9=4.6
13/6=2.1
4.6-2.1=2.5
Пошаговое объяснение:
42/9 - 13/6 = (42*2)/(9*2) - (13*3)/(6*3) =
84/18 - 39/18 = (84-39)/18 = 45/18 = (45:9)/(18:9) = 5/2 = 2 1/2
или:
42/9 - 13/6 = 4 6/9 - 2 1/6 = 4 12/18 - 2 3/18 =
2 9/18 = 2 1/2