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multiplication facts are simply that times table in this case 5
25 is a perfect square (5 times 5)
1 x 25, 5 x 5.
As a product of its prime factors: 2*3*3*5*5 = 450
Turnaround facts help you solve sums by encouraging you to start with the greater number first and add the lesser. ie. 5 + 1 = 6 is easier to solve than 1 + 5 = 6