分析:(1)这组数列分别是7的0倍,1倍,2倍,3倍…
(2)这组数列分别是9的0倍,1倍,2倍,3倍…
(3)这组数列分别是8的0倍,1倍,2倍,3倍…
(4)这组数列分别是6的0倍,1倍,2倍,3倍…
解答:解:(1)7×4=28,
7×6=42,
7×7=49,
7×9=63;
这组数列是:0,7,14,21,28,35,42,49,56,63;
(2)9×3=27,
9×5=45,
9×7=63,
9×8=72,
9×9=81;
这组数列是:0,9,18,27,36,45,54,63,72,81;
(3)8×1=8,
8×3=24,
8×4=32,
8×6=48,
8×7=56,
8×8=64;
这组数列是:0,8,16,24,32,40,48,56,64,72;
(4)6×2=12,
6×4=24,
6×5=30,
6×6=36,
6×7=42,
6×8=48,
6×9=54;
这组数列是:0,6,12,18,24,30,36,42,48,54.
故答案为:28,42,49,63;27,45,63,72,81;8,24,32,48,56,64;12,24,30,36,42,48,54.
点评:解决本题关键是熟记乘法口诀,并灵活运用.