Ответы на вопрос:
1) 162-270: 9+18*31=690 1)270: 9=30 2)18*31=558 3)162-30=132 4)132+558=690 2) 375*19-2660: 28=7030 1)375*19=7125 2)2660: 28=95 3)7125-95=7030
(9 5/6 - 8 13/15) / 29 + 6,5 * 4 1/3 = (59/6 - 133/15) / 29 + 13/2 * 13/3 = (59*5/30 - 133*2/30) / 29 + 169/6 = (295/30 - 266/30) / 29 + 169/6 = 29/30 / 29 + 169/6 = 1/30 + 169/6 = 1/30 + 169*5/30 = (1 + 845)/30 = 846/30 = 28 6/30 = 28 1/5
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