题目

找规律,写数字
1.four,____,twelve_____,_____
2.three,six._____,twelve,______,______
3.ten,twelve,_____,____,______,twenty
4.one,three,six,____,_____,twenty-one
请说明为什么

提问时间：2020-10-18

答案

1.four,eight ,twelve sixteen,twenty 4 8 12 16 202.three,six.nine,twelve,fifteen,eighteen 3 6 9 12 15 183.ten,twelve,fourteen,sixteen,eighteen,twenty 10 12 14 16 18 20 4.one,three,six,ten,fifteen,twent...