计算:1.(1-1/2)x(1-1/3)x(1-1/4)x...x(1-1/2012) 2.(-5)x(-3又6/7)+(-7)x(-3又6/7)-(-12)x(-3又6/7)3.1又2/3-(1/3-1/6+5/12)x2.4的差x5

问题描述:

计算:1.(1-1/2)x(1-1/3)x(1-1/4)x...x(1-1/2012) 2.(-5)x(-3又6/7)+(-7)x(-3又6/7)-(-12)x(-3又6/7)
3.1又2/3-(1/3-1/6+5/12)x2.4的差x5