181. Решение:
1) \(-36 + 79 - 42 + 79 = -36 - 42 + 79 + 79 = -78 + 158 = 80\)
2) \(3.19 - 5.9 - 0.86 = 3.19 - (5.9 + 0.86) = 3.19 - 6.76 = -3.57\)
3) \(2.4 + (-5.36) - (-0.84) + (-3.24) = 2.4 - 5.36 + 0.84 - 3.24 = 2.4 + 0.84 - 5.36 - 3.24 = 3.24 - 8.6 = -5.36\)
4) \(-16.54 + (-9.31) - 11.27 - (-23.38) = -16.54 - 9.31 - 11.27 + 23.38 = -37.12 + 23.38 = -13.74\)
5) \(5\frac{3}{7} + (-2\frac{1}{4}) - (-3\frac{3}{28}) = \frac{38}{7} - \frac{9}{4} + \frac{87}{28} = \frac{152}{28} - \frac{63}{28} + \frac{87}{28} = \frac{152 - 63 + 87}{28} = \frac{176}{28} = \frac{44}{7} = 6\frac{2}{7}\)
6) \(3\frac{5}{9} + (-2\frac{1}{4}) - (-4\frac{5}{6}) - 5\frac{2}{3} = \frac{32}{9} - \frac{9}{4} + \frac{29}{6} - \frac{17}{3} = \frac{128}{36} - \frac{81}{36} + \frac{174}{36} - \frac{204}{36} = \frac{128 - 81 + 174 - 204}{36} = \frac{17}{36}\)
Убрать каракули