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5⅖×1,5×(6,4-5⁵/₆)=5,4*1,5*(6²/₅-5⁵/₆)=8,1*(6¹²/₃₀-5²⁵/₃₀)=8,1*¹⁷/₃₀=
=⁸¹/₁₀*¹⁷/₃₀=¹³⁷⁷/₃₀₀=4,59
(0,75+6,4÷ ⁸/₁₅)×0,8=(0,75+⁶⁴/₁₀*¹⁵/₈)*0,8=(0,75+12)*0,8=12,75*0,8=10,2
(²/₉+1,4)×3⅗+6¼÷0,25=(²/₉+1⅖)*3⅗+6,25:0,25=(¹⁰/₄₅+1¹⁸/₄₅)+25=1²⁸/₄₅+25=
=26²⁸/₄₅
3⅓×1⅛-2,5=¹⁰/₃*⁹/₈-2½=¹⁵/₄-2½=3¾-2²/₄=1¹/₄=1,25
5,2x1,5x(6,4-5,56)=7,8x(64/10-35/6)=7,8x(192/30-175/30)=
=7,8x17/30=4,42
(0,75+6,4/ 8/15)x0,8= (0,75+12)x0,8=10,2
7,24-5,12=2,12
pod kreska: 3,75-2,5=1,25
6,4/1,25=5,12