С решением
а) -0,28*4/7+5\7:2 6/7
б) 5/6*(-0,3) - 4/5:1 1/15
" / " -Дробная черта.
а) -0,28*4/7+5\7:2 6/7
б) 5/6*(-0,3) - 4/5:1 1/15
" / " -Дробная черта.
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Answers & Comments
а) -0,28*4/7+5\7:2 6/7 = -28/100 * 4/7 + 5/7÷26/7 = - 4/25 + 5/26 =-104+ 125 / 650 = 21/ 600 = 7/300
б) 5/6*(-0,3) - 4/5:1 1/15 = 5/6 * (-3/10) - 4/5 ÷ 11/15 = -1/ 4 - 12/11 = -11- 48 / 44 = -59/44 = - 1 целая 15/44