问题 解答题
简便计算
536-1980.75×5.3+4.7×0.751
3
4
-
5
6
+
1
4
-
1
6
答案

(1)536-198

=536-(200-2),

=536-200+2,

=336+2,

=338;

(2)0.75×5.3+4.7×0.75

=(5.3+4.7)×0.75,

=10×0.75,

=7.5;

(3)1

3
4
-
5
6
+
1
4
-
1
6

=1

3
4
+
1
4
-(
5
6
+
1
6
),

=2-1,

=1.

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