问题
解答题
计算:(1)
(2)(2
|
答案
(1)
+63
-1 7
=345
+7
-37 7
=5
-322 7 7
;5
(2)(2
+35
)(-32
+22
)=(25
)2-(35
)2=20-18=2.2
计算:(1)
(2)(2
|
(1)
+63
-1 7
=345
+7
-37 7
=5
-322 7 7
;5
(2)(2
+35
)(-32
+22
)=(25
)2-(35
)2=20-18=2.2