计算:(1)3 1 2 -(- 1 3 )+(- 1 2 )+2 2 3 (2)-1
计算:(1)312-(-13)+(-12)+223(2)-14-16×〔3-(-32)〕×(-2)(3)(-79-1112+16)×(-6)2(4)-22-[2-(1+1...
计算:(1)3 1 2 -(- 1 3 )+(- 1 2 )+2 2 3 (2)-1 4 - 1 6 ×〔3-(-3 2 )〕×(-2)(3)(- 7 9 - 11 12 + 1 6 )×(-6) 2 (4)-2 2 -[2-(1+ 1 3 ×0.5)]÷[3 2 -(-2) 2 ].
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(1)原式=3
=3
=3+3 =6; (2)原式=-1-
=-1-
=-1-2 =-3; (3)原式=(-
=-
=-28-33+6 =-61+6 =-55; (4)原式=-4-[2-(1+
=-4-[2-1
=-4-
=-4-
=-4
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