问题
解答题
计算下列各题,能简便的要简便计算.
6.75×
(
(0.75-
|
答案
(1)
+1 5
÷4 5
,2 5
=
+1 5
×4 5
,5 2
=
+2,1 5
=2
;1 5
(2)6.75×
+3.25÷2 5
,5 2
=6.75×
+3.25×2 5
,2 5
=(6.75×+3.25)×
,2 5
=10×
,2 5
=4;
(3)(
-11 14
+5 7
)×28,5 28
=
×28-11 14
×28+5 7
×28,5 28
=22-20+5,
=7;
(4)(0.75-
)×(3 16
+2 9
),1 3
=(
-3 4
)×(3 16
+2 9
),3 9
=
×9 16
,5 9
=
.5 16