It is a square number because 20 times 20 = 400
1 x 20 2 x 10 4 x 5
multiplication facts are simply that times table in this case 5
multiplication fact means the truth
each side is multiplied together.
Multiplication facts and tables can be found all over the internet. A good place for worksheets for multiplication is through the Education website. Also, many teacher stores will have products regarding multiplication.
A good fun website for multiplication facts is multiplication .com
Some multiplication facts for 81 are 9 x 9 3 x 27 1 x 81
The answer depends on different from WHAT!