问题
解答题
计算下列各式: (1)
(2)(
(3)(
(4)(5+
|
答案
(1)原式=
×3 5
×3 7 7 5
=9 25
=
;3 5
(2)原式=(
)2-(5
)22
=5-2
=3;
(3)原式=3+2
+13
=4+2
;3
(4)原式=5
-15+3-33 3
=2
-12.3
计算下列各式: (1)
(2)(
(3)(
(4)(5+
|
(1)原式=
×3 5
×3 7 7 5
=9 25
=
;3 5
(2)原式=(
)2-(5
)22
=5-2
=3;
(3)原式=3+2
+13
=4+2
;3
(4)原式=5
-15+3-33 3
=2
-12.3