问题
解答题
怎样简单怎样算.
5.56-
|
答案
(1)
+(5 9
-3 4
)1 2
=
+5 9 1 4
=
;29 36
(2)
+9 7
+1 8
+3 8 5 7
=(
+9 7
)+(5 7
+1 8
)3 8
=2+1 2
=2
;1 2
(3)
-10 3
-3 10 7 10
=
-(10 3
+3 10
)7 10
=
-110 3
=2
;1 3
(4)5.56-
+4.44-3 7 4 7
=(5.56+4.44)-(
+3 7
)4 7
=10-1
=9.