问题
解答题
计算: (1)
(2)
(3)8x
(4)(
(5)
|
答案
(1)
+275
-8 200
=5
+43
-102 2
=5
-63
;2
(2)
+32
-0.5
+83 3 1 3
=
+2
-3 2 2
+3 3 8 3 3
=
+11 2 2
;7 3 3
(3)8x
-x2x 4
-1 x 5 3
+9x x3
=8x
-xx 2
-5x
+xx x
=(4x-5)
;x
(4)(
+47
)(3
-47
)-(33
-1)5
=7-(4
)2-33
+15
=-40-3
;5
(5)
-a3b
-a2ab3
+b a ab
=|a|
-|b|ab
-|a|ab
+ab ab
=(1-|b|)
.ab