1 x 9, 3 x 3
The inverse of multiplication is division.
1 x 21 3 x 7 7 x 3 21 x 1
Its all equal
Division by zero is not infinity, it is a forbidden operation in mathematics.
1x3=3x3=9
None
the facts are that its has a hardness of 9 and is part of corundum
Eight 9s do not equal 100. 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 72
1 x 36, 2 x 18, 3 x 12, 4 x 9, 6 x 6.
3 squared is equal to 9
9 meters equal 9000 millimetres.
As a fraction 0.9 is equal to 9/10