ниже
Пошаговое объяснение:
1/9*1/3=1/27
1/11-7/11=-6/11
4/9+8/12=4/9+2/3=4/9+6/9=10/9
ответ:1) 1/4 + 2/3 = 1/4 * 3/3 + 2/3 * 4/4 = 3/12 + 8/12 = 11/12 = 0,91(6).
2) 1/5 + (-2) = 0,2 - 2 = -1,8.
3) 0,9 + (-1,5) = 0,9 - 1,5 = -0,6.
4) 5/9 * (-3/5) = (-5 * 3) / (5 * 9) = -5/5 * 3/9 = -1 * 1/3 = 1/3 = 0,(3).
5) (-2 и 1/4) * 2/3 = -9/4 * 2/3 = (-9 * 2) / (4 * 3) = -9/3 * 2/4 = -3 * 1/2 = -1,5.
6) 0,9 * (-2,7) = -2,43.
7) 4/15 : 2/3 = 4/15 * 3/2 = 2/5 = 0,4.
8) 1/6 : (-2/3) = 1/6 * (-3/2) = 1/2 * (-1/2) = -1/4 = -0,25.
9) 0,5 : (-0,3) = -1,(6).
ниже
Пошаговое объяснение:
1/9*1/3=1/27
1/11-7/11=-6/11
4/9+8/12=4/9+2/3=4/9+6/9=10/9
ответ:1) 1/4 + 2/3 = 1/4 * 3/3 + 2/3 * 4/4 = 3/12 + 8/12 = 11/12 = 0,91(6).
2) 1/5 + (-2) = 0,2 - 2 = -1,8.
3) 0,9 + (-1,5) = 0,9 - 1,5 = -0,6.
4) 5/9 * (-3/5) = (-5 * 3) / (5 * 9) = -5/5 * 3/9 = -1 * 1/3 = 1/3 = 0,(3).
5) (-2 и 1/4) * 2/3 = -9/4 * 2/3 = (-9 * 2) / (4 * 3) = -9/3 * 2/4 = -3 * 1/2 = -1,5.
6) 0,9 * (-2,7) = -2,43.
7) 4/15 : 2/3 = 4/15 * 3/2 = 2/5 = 0,4.
8) 1/6 : (-2/3) = 1/6 * (-3/2) = 1/2 * (-1/2) = -1/4 = -0,25.
9) 0,5 : (-0,3) = -1,(6).
Пошаговое объяснение: