问题
解答题
计算,能简算的要简算.
|
答案
(1)
×5 7
+4 5
÷2 7
,5 4
=
×5 7
+4 5
×2 7
,4 5
=(
+5 7
)×2 7
,4 5
=1×
,4 5
=
;4 5
(2)
×2.5%×165,4 11
=
×165×2.5%,4 11
=60×2.5%,
=1.5;
(3)(
-2 3
)÷3 8
,1 24
=(
-2 3
)×24,3 8
=24×
-2 3
×24,3 8
=16-9,
=7;
(4)7×
+29×50%,1 2
=(7+29)×
,1 2
=36×
,1 2
=18;
(5)[1-(
+1 4
)]÷3 8
,1 3
=(1-
)÷5 8
,1 3
=
÷3 8
,1 3
=
.9 8