问题
解答题
4
|
答案
4
-21 3
+51 6
-31 9
+127 18
,5 36
=(4+
)-(2+1 3
)+(5+1 6
)-(3+1 9
)+(12+7 18
),5 36
=4+
-2-1 3
+5+1 6
-3-1 9
+12+7 18
,5 36
=(4-2+5-3+12)+(
-1 3
+1 6
-1 9
+7 18
),5 36
=(4-2+5-3+12)+(
-12 36
+6 36
-4 36
+14 36
),5 36
=16+
,1 36
=16
.1 36