4.335 Выполните действия: a) (46-53): 0,7; 6) (-42,6 - 57,4): (-0,01); в) (-34,1 + 44,9): 2,7; r) 652,8: (-95,1 + 93,5); д) 5,4: (-0,2-0,3); e) -0,612:(-0,4-0,2 - 0,1); ж) 1 7 12 : ( 5 + 1 12 4); 3) (-0,5+): 3,2.

а) \[ (46 - 53) : 0.7 = -7 : 0.7 = -10 \]

б) \[ (-42.6 - 57.4) : (-0.01) = -100 : (-0.01) = 10000 \]

в) \[ (-34.1 + 44.9) : 2.7 = 10.8 : 2.7 = 4 \]

г) \[ 652.8 : (-95.1 + 93.5) = 652.8 : (-1.6) = -408 \]

д) \[ 5.4 : (-0.2 \cdot 0.3) = 5.4 : (-0.06) = -90 \]

е) \[ -0.612 : (-0.4 \cdot 0.2 - 0.1) = -0.612 : (-0.08 - 0.1) = -0.612 : (-0.18) = 3.4 \]

ж) \[ 1\frac{7}{12} : (\frac{5}{12} + \frac{1}{4}) = \frac{19}{12} : (\frac{5}{12} + \frac{3}{12}) = \frac{19}{12} : \frac{8}{12} = \frac{19}{12} \cdot \frac{12}{8} = \frac{19}{8} = 2\frac{3}{8} = 2.375 \]

з) \[ (-0.5 + \frac{2}{3}) : 3.2 = (-\frac{1}{2} + \frac{2}{3}) : 3.2 = (\frac{-3}{6} + \frac{4}{6}) : 3.2 = \frac{1}{6} : 3.2 = \frac{1}{6} : \frac{32}{10} = \frac{1}{6} \cdot \frac{10}{32} = \frac{10}{192} = \frac{5}{96} \approx 0.052 \]