Add the decimals: align the decimal points.
• 15.37 + 6.85
• 7 + 5 = 12 hundredths: write 2, carry 1 to tenths
• 3 + 8 + 1(carry) = 12 tenths: write 2, carry 1 to ones
• 5 + 6 + 1(carry) = 12 ones: write 2, carry 1 to tens
• 1 + 0 + 1(carry) = 2 tens
• 15.37 + 6.85 = 22.22
Final Answer: 22.22