Math CentralQuandaries & Queries


Question from Cynthia, a parent:

write an expression for the value of a three-digit number whos hundreds, tens, and units digits are x, y, and z, respectively


The three digit number 728 (seven hundred and twenty eight) can be written 7 × 100 + 2 × 10 + 8. The hundreds digit is therefore 7, the tens digit is 2 and the units digit is 8. If the hundreds digit was x, the tens digit was y and the units digit was z then the number would be x × 100 + y × 10 + z.


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