Пошаговое объяснение:
1) 7/12(-0.35)= - 7/12 * 35/100 = -7*35/12*100= -245/3500= -49/240;
2) 1.15 + (-1 1/4) = 1.15 - 1.25 = -0,1.
3) -8,2 + 9 3/7 = -8 2/10+9 3/7= -8 14/70 + 9 30/70 = 16/70 = 8/35;
4) -8 3/8 + 7,75 = -8.375 + 7.75= -0,625.
Пошаговое объяснение:
1) 7/12(-0.35)= - 7/12 * 35/100 = -7*35/12*100= -245/3500= -49/240;
2) 1.15 + (-1 1/4) = 1.15 - 1.25 = -0,1.
3) -8,2 + 9 3/7 = -8 2/10+9 3/7= -8 14/70 + 9 30/70 = 16/70 = 8/35;
4) -8 3/8 + 7,75 = -8.375 + 7.75= -0,625.