Some multiplication facts for 81 are 9 x 9 3 x 27 1 x 81
-2 x 3
Product of its prime factors are: 3*3*5 = 45
multiplication facts are simply that times table in this case 5
The "multiplication facts" may be numbered differently in different textbooks, so it is really hard to guess what multiplication facts you are talking about. Better use the standard names, for example, "commutative property", "associative property", etc. For a multiplication such as 3 x 7, you either memorize the tables, your you do the repeated addition (3 x 7 = 7 + 7 + 7, that is, 7 appears 3 times as an addend.)
1x3=3x3=9
Some multiplication facts for 81 are 9 x 9 3 x 27 1 x 81
1 x 21 3 x 7 7 x 3 21 x 1
-2 x 3
Product of its prime factors are: 3*3*5 = 45
multiplication facts are simply that times table in this case 5
The "multiplication facts" may be numbered differently in different textbooks, so it is really hard to guess what multiplication facts you are talking about. Better use the standard names, for example, "commutative property", "associative property", etc. For a multiplication such as 3 x 7, you either memorize the tables, your you do the repeated addition (3 x 7 = 7 + 7 + 7, that is, 7 appears 3 times as an addend.)
As a product of its prime factors: 2*3*3*5 = 90
multiplication fact means the truth
As a product of its prime factors: 2*3*3*5*5 = 450
The fact that 3 x 9 = 27
3 is 1 third of nine. so for 1x9 just do 1x3 and times the answer by 3. 1x3=3 and 3x3=9 so 1x9=9. 2x3=6 and 6x3=18 so 9x2=18 and so on and so on.