1. (6-9 3/5)×(-1 2/3)-12×(-3/4+1/8) 2. (8-6 1/4): (-5/8)-9×(-1/2+2/5) 3. (2,8-6)×3 1/,6): 1/4+(-5,7) 4. (1,9-5): (-1 11/20)+4,8: (-1/6)×100 , ! : с
108
362
Ответы на вопрос:
1) (5 5/5-9 3/5)×(-1 2/3)-12×(-3/4+1/8)= -4 2/5×(-1 2/3)-12×(-5/8)= 22/3+15/2=44/6+45/6=89/6=14 5/6
А) 2х+2,4 = 2,7-х 2х+х = 2,7-2,4 3х=0,3 х=0,1 б) 2/х= 15/10 : 675/100 2/х= 15/10 * 100/675 2/х=10/45 х=90/10=9
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