Вычислите (это дроби) а) (1/6+2/3)*3 b) (17/30-2/15): - вопрос №48603091623317302151318345 от lol1049 29.01.2020 04:43

Question

Математика: Вычислите (это дроби) а) (1/6+2/3)*3 b) (17/30-2/15): 13 в) (1/8+3/4): 5 г) (4/3+1/9)*4 д) (1/2+1/3)*2 e) (1/2-1/3)*3 ! с решение

lol1049 · Answer

1) (1/6 + 2/3) * 3 = 5/6 * 3 = 5/6 * 3/1 = 5/2 = 2 1/2
2) (17/30 - 2/15) : 13 = 13/30 : 13 = 13/30 * 1/13 = 1/30
3) (1/8 + 3/4) : 5 = 7/8 : 5 = 7/8 * 1/5 = 7/40
4) (4/3 + 1/9) * 4 = 13/9 * 4 = 52/9 = 5 7/9
5) (1/2 + 1/3) * 2 = 5/6 * 2 = 5/3 = 1 2/3
6) (1/2 - 1/3) * 3 = 1/6 * 3 = 1/2