解不等式组: 1 + x > 0 2 x - 1 < 3 .
(-2×52)3×[6-2×(-1)2×(-)+(-6)2×(-)2-()2×(-8)2].
计算:
、(-1)5×{[4÷(-4)-1×(-0.4)]÷(-)-2};
(-4)-(-2)-{(-5)-[(-7)+(-3)-(+8)]};
-0.52+-│-22-4│-(-1)3×;