问题
解答题
|
答案
(1)(
-4 5
)×15,2 3
=
×15-4 5
×15,2 3
=12-10,
=2;
(2)40%×
+1 3
÷2 3
,5 2
=
×2 5
+1 3
×2 3
,2 5
=
×(2 5
+1 3
),2 3
=
×1,2 5
=
;2 5
(3)39×
×1 2
,7 13
=(39×
)×7 13
,1 2
=21×
,1 2
=
;21 2
(4)0.125×
+4 11
÷1 8
+12.5%×11 2
,5 11
=0.125×
+0.125×4 11
+0.125×2 11
,5 11
=0.125×(
+4 11
+2 11
),5 11
=0.125×1,
=0.125.