今天思维训练课上,夏老师给我们带来一顿“智力大餐”:请用简便的方法计算78×25+26×25。我一看,便犯了难,虽然有共同乘数,可是78加上26的和是104,并不是整数呀!这该怎样解决呢?我思考了半天,可是一点眉目也没有。唉,看来这“智力大餐”也不是那么容易吃的呀!咦,要是我不用25做共同乘数,会怎样呢?嘿!正好,78是26的3倍,那么78不是可以看做26×3吗,那不就创造出共同乘数了!我像一个寻宝者费了九牛二虎之力发现了宝藏一样兴奋,找到了宝藏,要把它搬出来就不难啦!我三下五除二就搬 Today thinking training class, summer teacher brought us a meal “intelligence meal ”: Please use the easy way to calculate 78 × 25 +26 × 25. When I saw it, I made a mistake. Although there was a common multiplier, but the sum of 78 and 26 was 104, not an integer. What should I do? I thought for a long while, but I did not see anything. Oh, it seems like this is not so easy to eat! 咦 If I do not have a common multiplier of 25, what happens? Hey, right, 78 is three times as many as 26, so 78 is not OK As a 26 × 3, that does not create a common multiplier! I like a treasure hunter took the tremendous efforts to find the treasures of the same excitement, to find the treasure, it is not difficult to move out it! I move on the next five to two