Add the decimals: align the decimal points.<br><br>&bull; 7.83 + 5.28<br>&bull; 3 + 8 = 11 hundredths: write 1, carry 1 to tenths<br>&bull; 8 + 2 + 1(carry) = 11 tenths: write 1, carry 1 to ones<br>&bull; 7 + 5 + 1(carry) = 13 ones<br>&bull; 7.83 + 5.28 = 13.11<br><br>Final Answer: 13.11