问题
解答题
计算: (1)(
(2)(
|
答案
(1)原式=
+3
+6
-6
=23
;6
(2)原式=5
+2
-10
-15
≈5×1.414+3.162-2.236-1
=7.070+3.162-2.236-1
=6.996
≈7.00.
计算: (1)(
(2)(
|
(1)原式=
+3
+6
-6
=23
;6
(2)原式=5
+2
-10
-15
≈5×1.414+3.162-2.236-1
=7.070+3.162-2.236-1
=6.996
≈7.00.