Question

How can these models be used to find the sum 2.3 + 1.94?

Answer 1

4.24

Explanation:

See the attached diagram.

The models show a total of 3 wholes, 12 tenths, and 4 hundredths.

After regrouping 10 tenths into one whole there are 4 wholes, 2 tenths, and 4 hundredths.

Therefore, the sum of the numbers is (4 + 0.2 + 0.04) = 4.24. (Answer)