问题
填空题
计算:[(-5)×(-3
|
答案
原式=(5×
+7×27 7
-12×27 7
)÷(-1)27 7
=(5+7-12)×
×(-1)27 7
=0×
)×(-1)27 7
=0.
故答案为0.
计算:[(-5)×(-3
|
原式=(5×
+7×27 7
-12×27 7
)÷(-1)27 7
=(5+7-12)×
×(-1)27 7
=0×
)×(-1)27 7
=0.
故答案为0.