问题
解答题
1949×(
|
答案
1949×(
-1 51
)+51×(1 2000
-1 1949
)-2000×(1 2000
+1 1949
)+3,1 51
=
-949 51
+1949 2000
-51 1949
-51 2000
-2000 1949
,2000 51
=(
-1949 51
)+(2000 51
-51 1949
)-(2000 1949
+1919 2000
)+3,51 1949
=-1-1-1+3,
=0.