积数是由两个或多个数字相乘得到的结果。以下是10以内的积数：
1 × 1 = 1 1 × 2 = 2 1 × 3 = 3 1 × 4 = 4 1 × 5 = 5 1 × 6 = 6 1 × 7 = 7 1 × 8 = 8 1 × 9 = 9 1 × 10 = 10 2 × 2 = 4 2 × 3 = 6 2 × 4 = 8 2 × 5 = 10 3 × 3 = 9 3 × 4 = 12 3 × 5 = 15 4 × 4 = 16 4 × 5 = 20 5 × 5 = 25 6 × 6 = 36 7 × 7 = 49 8 × 8 = 64 9 × 9 = 81 10 × 10 = 100
以上是10以内的积数。
有1～9共9个数字，因为1乘10以内任何数和都在10以内，2乘3或4积在10以内，3乘以其他大于3的积都大于10，超出积数在10的范围。
