How do you model 624 without using tens

Answer 1

When I saw your subject line, I thought you might be asking about the French man who helped the Americans in our Revolutionary War.

You could model it by using 20s.

Answer 2

exactly, change number bases. you have 624 in base 10.

In base 5, it would be one less than 10000 or 4444
that is four 125 units, four 25 units, and four five units, and 4 single units

Or you can convert 624 base 10 to binary, or 1001110000