> 数学 >
1949×(
1
51
1
2000
)+51×(
1
1949
1
2000
)−2000×(
1
1949
+
1
51
)+3
人气:261 ℃ 时间:2019-12-18 05:26:37
解答
1949×(
1
51
-
1
2000
)+51×(
1
1949
-
1
2000
)-2000×(
1
1949
+
1
51
)+3,
=
949
51
-
1949
2000
+
51
1949
-
51
2000
-
2000
1949
-
2000
51

=(
1949
51
-
2000
51
)+(
51
1949
-
2000
1949
)-(
1919
2000
+
51
1949
)+3,
=-1-1-1+3,
=0.
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