题目内容
先用计算器计算前三题的得数,再直接写出后面各题的得数.
(1)
6×9=
6.6×6.9=
6.66×66.9=
6.666×666.9=
6.6666×6666.9=
6.66666×66666.9=
(2)
81÷9=
88.2÷9=
88.83÷9=
88.884÷9=
88.8885÷9=
88.88886÷9=
(1)
6×9=
6.6×6.9=
6.66×66.9=
6.666×666.9=
6.6666×6666.9=
6.66666×66666.9=
(2)
81÷9=
88.2÷9=
88.83÷9=
88.884÷9=
88.8885÷9=
88.88886÷9=
分析:(1)先用计算器计算出前几个算式,从答案中发现规律,依次整数部分多一个4,小数的部分多一个5,据此写出剩下算式的答案即可;
(2)先计算出前几个算式,得出答案中整数部分是9,小数部分每次多一位连续的自然数.据此解答即可.
(2)先计算出前几个算式,得出答案中整数部分是9,小数部分每次多一位连续的自然数.据此解答即可.
解答:解:(1)
6×9=54;
6.6×6.9=45.54;
6.66×66.9=445.554;
6.666×666.9=4445.5554;
6.6666×6666.9=44445.55554;
6.66666×66666.9=444445.555554;
(2)
81÷9=9;
88.2÷9=9.8;
88.83÷9=9.87;
88.884÷9=9.876;
88.8885÷9=9.8765;
88.88886÷9=9.87654;
故答案为:54;45.54;445.554;4445.5554;44445.55554;444445.555554;
(2)9;9.8;9.87;9.876;9.8765;9.87654.
6×9=54;
6.6×6.9=45.54;
6.66×66.9=445.554;
6.666×666.9=4445.5554;
6.6666×6666.9=44445.55554;
6.66666×66666.9=444445.555554;
(2)
81÷9=9;
88.2÷9=9.8;
88.83÷9=9.87;
88.884÷9=9.876;
88.8885÷9=9.8765;
88.88886÷9=9.87654;
故答案为:54;45.54;445.554;4445.5554;44445.55554;444445.555554;
(2)9;9.8;9.87;9.876;9.8765;9.87654.
点评:此题主要考查通过计算找出规律,再根据规律写出答案.
练习册系列答案
相关题目