Ответ:
5 83/120
Пошаговое объяснение:
6 − 1,9/12 ⋅ 3 + 3/6 ⋅ 7/21 = 5 83/120
1) 1,9/12 · 3 = 1,9/4 = 19/40
2) 3/6 · 7/21 = 1/2 · 1/3 = 1/6
3) 6 - 19/40 = 5 + (40/40 - 19/40) =5 21/40
5 21/40 + 1/6 = 5 63/120 + 20/120 = 5 83/120
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Ответ:
5 83/120
Пошаговое объяснение:
6 − 1,9/12 ⋅ 3 + 3/6 ⋅ 7/21 = 5 83/120
1) 1,9/12 · 3 = 1,9/4 = 19/40
2) 3/6 · 7/21 = 1/2 · 1/3 = 1/6
3) 6 - 19/40 = 5 + (40/40 - 19/40) =5 21/40
5 21/40 + 1/6 = 5 63/120 + 20/120 = 5 83/120