Any six fact can be found by doubling the related three fact.
Any seven fact can be found by using repeated addition.
Any eight fact can be found by doubling the related four fact.
Any nine fact can be found by using repeated addition. For 9 × 1 and up, the digits of the product add up to nine. For 9 × 2 and up, the first digit of the product is one less than the other factor (not the 9). For example, 9 × 4 = 36, 3 + 6 = 9
Any ten fact can be found by skip counting by tens or by adding a 0 to the other factor.