-21又2/3+3又-1/4-(-2/3)-(+1/4)的计算过程;
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![-21又2/3+3又-1/4-(-2/3)-(+1/4)的计算过程;](/uploads/image/z/10211896-64-6.jpg?t=-21%E5%8F%882%2F3%2B3%E5%8F%88-1%2F4-%EF%BC%88-2%2F3%EF%BC%89-%EF%BC%88%2B1%2F4%EF%BC%89%E7%9A%84%E8%AE%A1%E7%AE%97%E8%BF%87%E7%A8%8B%EF%BC%9B)
-21又2/3+3又-1/4-(-2/3)-(+1/4)的计算过程;
-21又2/3+3又-1/4-(-2/3)-(+1/4)的计算过程;
-21又2/3+3又-1/4-(-2/3)-(+1/4)的计算过程;
-21又2/3+3又-1/4-(-2/3)-(+1/4)
=(-21又2/3+2/3)+(3又1/4-1/4)
=-21+2
=-19
-21又2/3+3又-1/4-(-2/3)-(+1/4)
=-21 - 2/3 -3 -1/4 +2/3- 1/4
=-21-3 -1/2
=-24又1/2