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数学
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先计算,再来比一比,找规律.急.
1*8+1 9*9-1
12*8+2 98*9-2
123*8+3 987*9-3
看看有什么规律,能写出来吗?
人气:211 ℃ 时间:2020-04-01 09:04:12
解答
题目要求先计算,就可找出规律了
左边按顺序的得数分别是 9,98,987,那按这个规律下一个一定是 1234*8+4=9876
右边的得数依次是 80,880,8880,
那下一个算式和得数一定是 9876*9-4=88880
这种题一定是先要计算以后,才可发现规律的
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