计算: (1)-3-5+12; (2)(-81)÷×÷(-16); (3)-32-25×(-)2; (4)-24×(-+-); (5)-14-(1+0.5)×÷4; (6)-22×-(-1)2÷(-)-(-1)5.
计算:
计算: (1)+-; (2)(5-2)×(-); (3)(1++)(1--); (4)(-4)(2-4).