问题
解答题
计算 ①(-
②
|
答案
①原式=-
-2 3
+1 3
+3 4 1 4
=-1+1
=0;
②原式=
×(-8 5
)-5 12
×(-8 21
)-7 4
×2×21 2
=-
+2 3
-22 3
=-2.
计算 ①(-
②
|
①原式=-
-2 3
+1 3
+3 4 1 4
=-1+1
=0;
②原式=
×(-8 5
)-5 12
×(-8 21
)-7 4
×2×21 2
=-
+2 3
-22 3
=-2.