计算题解答(16题)1.(-2)x(-5)2.(-1/2)x2/33.(-7/4)x(-4/7)4.(-12.5)x(-6/7)x(-48)x5/6x05.(-3)x5/6x(-9/5)x(-1/4)x(+9/7)6.(1/1998-1)(1/1997-1)(1/1996-1).(1/1001-1)(1/1000-1)7.(-0.8)x(-7/3)8.(-3/2)x(-8/3)x(+1

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