6+12+18+24+30+36+42+48+54+60+66+72+78+84+90+96+102······+600
6+12+18+24+30+36+42+48+54+60+66+72+78+84+90+96+102······+600
第12 18 24 30 36 42 48 54 60 72 78 84 90 求答案-------
快 6·8·10·12·16·20·22·30·34·36·38·40·44(页)
有一列数6,12,18,24,······
找规律-6,6,30,78,······
9·10·11·12·13·14·15·16·17·18·19·20·21·22·23·24·25·26·27·28号用
-2,4,-8,16,-32,64,···· 0,6,-6,18,-30,66,···· -1,2,-4,8,-16,3
2*4*6+4*8*12+8*16*24+······20*40*60如题
12+14+16+18+······+30=?简便计算
简算 100 -98 + 96 - 94 + 92 -90+··········+4-2
62,63,64,65,66,67,72,73页 跪求····················
6×9=54 66×9= 666×9= 666‘······十个六×6