问题
解答题
计算: ①
②
③
④(1-
|
答案
(1)原式=2
+2
-1+2=32
+1;2
(2)原式=1 2
=
×10 3
×3 7 7 5 1 2
;2
(3)原式=2
-3x
+2x
=x
;x
(4)原式=1-2
+2-(1-2
)=1-22
+2-1+2
=2-2
.2
计算: ①
②
③
④(1-
|
(1)原式=2
+2
-1+2=32
+1;2
(2)原式=1 2
=
×10 3
×3 7 7 5 1 2
;2
(3)原式=2
-3x
+2x
=x
;x
(4)原式=1-2
+2-(1-2
)=1-22
+2-1+2
=2-2
.2