3 hundredths + 3 tenths = _____.
3 hundredths + 3 tenths = 0.33.
Step 1: Understand the words. “3 hundredths” means the digit is in the hundredths place. “3 tenths” means the digit is in the tenths place.
Step 2: Write each as a decimal.
(3) hundredths (=) (0.03)
(3) tenths (=) (0.3)
Step 3: Line up the decimals and add.
Write (0.3) as (0.30) so both have two decimal places.
(0.30)
(+;0.03)
(=;0.33)
Step 4: (Optional) Check with fractions.
(3/10 = 30/100)
(3/100 = 3/100)
(30/100 + 3/100 = 33/100)
(33/100 = 0.33)
Answer: (0.33).