问题
解答题
计算下面各题,能简便计算的请简便计算. (
6.5×0.64-6.5×0.54+6.5×90%
|
答案
(1)(
+5 12
)÷5 8
+5 8
,1 3
=
×25 24
+8 5
,1 3
=
+5 3
,1 3
=2;
(2)6.5×0.64-6.5×0.54+6.5×90%,
=6.5×0.64-6.5×0.54+6.5×0.9,
=6.5×(0.64-0.54+0.9),
=6.5×1,
=6.5;
(3)
+4 7
-1 5
+3 7
,4 5
=(
-4 7
)+(3 7
+1 5
),4 5
=
+1,1 7
=1
.1 7