1. Adding and Subtracting Decimals

2.  Adding Decimals  Subtracting Decimals  Estimating While Adding or Subtracting Decimals  Solving problems by Adding or Subtracting Decimals Section Objectives

3. Adding Decimals StepExample Step 1: Write the decimals so that the decimal points line up vertically. Add: 0.004 + 0.085 Step 2: Add or subtract as with whole numbers. Step 3: Place the decimal point in the sum or difference so that it lines up vertically with the decimal points in the problem.

4. Subtracting DecimalsEXAMPLE SOLUTION Subtract 3.3 from 28.

5. Estimating When Adding or Subtracting DecimalsEXAMPLE SOLUTION Subtract 2.1 from 7.6. Exact Estimate Since 5.5 is close to 6, our answer is reasonable.