To solve 3.7 ÷ 0.2, Joel placed base-10 blocks representing 3.7 on the mat below.

Then he separated them into groups of 0.2.

He found 18 groups of 0.2 with 0.1 left over. Joel said the answer is 18.1.

Was Joel correct? How do you know? How can you use the base-10 blocks to explain the quotient? Use a number line to model the same problem and strategy.