问题
解答题
用简便方法计算 52×
3.28×
|
答案
(1)52×
,50 51
=(51+1)×
,50 51
=51×
+1×50 51
,50 51
=50+
,50 51
=50
;50 51
(2)3.28×
+1.72×3 4
-0.75×5,3 4
=(3.28+1.72-5)×0.75,
=1×0.75,
=0.75.
用简便方法计算 52×
3.28×
|
(1)52×
,50 51
=(51+1)×
,50 51
=51×
+1×50 51
,50 51
=50+
,50 51
=50
;50 51
(2)3.28×
+1.72×3 4
-0.75×5,3 4
=(3.28+1.72-5)×0.75,
=1×0.75,
=0.75.