问题
解答题
简便计算
|
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.
简便计算
|
(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.