7x9
The multiplication fact (singular, not plural 'facts') that can be found is 7x9 = 63. Using the arrays, a 2x9 array (2 rows of 9 items) and 5x9 array (5 rows of 9 items) is 63: 2x9 = 18 5x9 = 45 18 + 45 = 63
7x9 is the multiplication fact that can be found using the arrays 2x9 and 5x9.
9
Oh, what a happy little question! When you have an array for 2 times 9, you can see 2 rows of 9, which equals 18. And when you have an array for 5 times 9, you can see 5 rows of 9, which equals 45. Keep exploring those arrays and you'll create a beautiful landscape of multiplication facts!
As the product of its prime factors: 3*3*5 = 45
45
45!
45
45
5(3+9) = 5x3 + 5x9 hope this helps
45
5x9.