问题 解答题
用简便方法计算
52×
50
51

3.28×
3
4
+1.72×
3
4
-0.75×5
答案

(1)52×

50
51

=(51+1)×

50
51

=51×

50
51
+1×
50
51

=50+

50
51

=50

50
51

(2)3.28×

3
4
+1.72×
3
4
-0.75×5,

=(3.28+1.72-5)×0.75,

=1×0.75,

=0.75.

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