Explain why it works to break apart a number by place values to muiltiply

Which statement about the annual percentage rate (apr) is not true?

Acompany charges $0.10 for each letter engraved. bobby plans to spend no more than $5.00 on the engraving on a jewelry box. write and solve an inequality to find the maximum number of letters he can have engraved.

George writes the mixed number as sum and uses the distributive property 1/2.-2/5=1/2-2+2/5=1/2