Question

假设A*B=(A+B)+(A-B),求13*5和13米(5*4)

有6个题，这是其中的一个。麻烦各位帮我，我升四年级，跳到了6年级，没学过啊，老师抽尖子生补课，拜托拜托......55
题目可能打错了，是假设A*B=(A+B)+(A-B),求13*5和13*(5*4)

Answer 1

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追问

你在说什么，看不懂。

Answer 2

往里面套就行了，13套A，5套B
后面那个可以先 5套A，4套B,得出结果再继续套

Answer 3

A*B=(A+B)+(A-B)=2A
13*5=2×13=26
13*（5*4）=13*（5×2）=13*10=26.

追问

最后一道不太懂，麻烦你解释一下吧。我回加财富

追答

A*B=(A+B)+(A-B)=2A
也就是说，运算的结果始终是前一个数的2倍。这就没什么难的了。

Answer 4

小朋友问问题，要把问题写清楚，13*5和13米(5*4)这是什么意思？