Henrique bought chocolate bars for $\mathrm{R} \$ 1.35$ each. He paid with a $\mathrm{R} \$ 10.00$ bill and received change less than $\mathrm{R} \$ 1.00$. How many bars did he buy?
As $8 \times 1.35 = 10.8$ is greater than 10, Henrique bought 7 chocolate bars and received $10 - 7 \times 1.35 = 0.55$ dollars, or 55 cents, in change.