问题
解答题
怎样算简便就怎样算. ①2.6×(2.205÷2.1) ②
③
|
答案
①2.6×(2.205÷2.1),
=2.6×1.05,
=2.73;
②
+1 3
×2 3
+5 6
,4 9
=
+1 3
+5 9
,4 9
=
+(1 3
+5 9
),4 9
=
+1,1 3
=1
;1 3
③
×5+16 27
÷11 27
,1 5
=
×5+16 27
×5,11 27
=(
+16 27
)×5,11 27
=1×5,
=5.