They are called roman numerals.
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10x5 and 1x50
There are 8 different pairs of whole numbers whose prodcut is 40. Allowing for commutativity (a*b = b*a), there are 16 possible ways.
it is helpful to wite number in different ways because they are easier to decipher or understand.for example decimals,fractions,scientific notation, and powers.
you can write that answer a thousand million ways!
write the product of 117 two different ways