问题
解答题
|
答案
(1)
-13 15
+1 6 5 6
=
-78 90
+15 90
,75 90
=
+63 90
,75 90
=1
;8 15
(2)25-
-5 12
,7 18
=25-(
+5 12
),7 18
=25-
,29 36
=24
;7 36
(3)
+2 3
-1 6 5 12
=
+8 12
-2 12
,5 12
=
-10 12
,5 12
=
;5 12
(4)
+2 3
-(4 5
-4 5
)1 5
=
+2 3
-4 5
,3 5
=
-22 15
,3 5
=
;13 15
(5)3-(
-19 21
)9 14
=3-
,11 42
=2
;31 42
(6)
+7 15
-(11 15
+3 10
)11 15
=
-18 15
,31 30
=
.1 6