计算:(1)4﹣8×(﹣)3(2)﹣5(x2﹣3)﹣2(3x2+5)(3)﹣12011+4×(﹣3)2÷(﹣2)(4)4a2+2(3ab﹣2a2)﹣(7ab﹣1)
(1) 24+(一14)+(一16)+8 (2) (3)(4)-+--- (5)
(1) (2)-1-〔1-(1-0.5×)〕×6 (3) (4) (5)(-+)×(-36) (6)
计算(46分=24分) ⑴ (4)
求值:计算:
计算: