问题
解答题
(1)2.5×(
(2)
|
答案
(1)原式=
(5 2
-2 5
)+21 3
=1-
+25 6
=2
;1 6
(2)原式=
×16 3
-5 4
×1 3 3 5
=
-20 3 1 5
=
=697 15
.7 15
(1)2.5×(
(2)
|
(1)原式=
(5 2
-2 5
)+21 3
=1-
+25 6
=2
;1 6
(2)原式=
×16 3
-5 4
×1 3 3 5
=
-20 3 1 5
=
=697 15
.7 15