-3/4+(-3/10)= -12 3/8+(4 11/2) -2 5/9 +(-2 5/8)= -6 7/12+7 4/9= За ранее спасибо!
проверь второй пример : + 4 целых 11/2 или + 41 целая 1/2 ???
-3/4 + (-3/10) = -15/20 + (- 6/20) = - 21/20= - 1 1/20 -2 5/9 + (- 2 5/8 ) = -2 40/70 + (- 2 45/72) = - 5 13/72 -6 7/12 + 7 4/9 = 7 16/36 - 6 21/36 = 31/36 - 12 3/8 + 4 11/2 = - 12 3/8 + 9 1/2 = =-12 3/8 + 9 4/8 = -2 7/8 или -12 3/8 + 41 1/2 = 41 4/8 -12 3/8 = 29 1/8
-3/4+(-3/10) = -(3/4+3/10) = =-(15/20+6/20) = =-21/20=-1целая 1/20
-2целых 5/9+(-2ц.5/8) = -(2 ц.5/9+2ц.5/8) = -(4ц.+(40/72+45/72)) = -4ц. 85/72 = -5ц.13/72
-6ц.7/12+7ц.4/9 = 7ц.4/9-6ц.7/12 = 7ц.16/36 -6ц.21/36 = 31/36