We are going to take a trip ______ next weekend.对于任意数a,定义运算“※”,a※b= a×b-a-b,12※4的值是()

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We are going to take a trip ______ next weekend.对于任意数a,定义运算“※”,a※b= a×b-a-b,12※4的值是()

We are going to take a trip ______ next weekend.对于任意数a,定义运算“※”,a※b= a×b-a-b,12※4的值是()
We are going to take a trip ______ next weekend.
对于任意数a,定义运算“※”,a※b= a×b-a-b,12※4的值是()

We are going to take a trip ______ next weekend.对于任意数a,定义运算“※”,a※b= a×b-a-b,12※4的值是()
We are going to take a trip at next weekend
12※4=12*4-12-4=32

for

on

32

We are going to take a trip __/(不填)____ next weekend.

问题补充:对于任意数a,b,定义运算“※”,a※b= a×b-a-b,12※4的值是(32)
12※4=12*4-12-4=32