Adding and Subtracting Decimals

Step 1: Line Up the Decimal Points

27.13 + 12.1 + 2.375

.

.

.

Step 2: Put in numbers by Place Value

27.13 + 12.1 + 2.375

27.1312.1

2.375

Step 3: Place zeros in empty place values

27.13 + 12.1 + 2.375

27.13012.1 0002.375

Step 4: Add or Subtract Numbers

27.13 + 12.1 + 2.375

27.13012.1 0002.37541 605

Step 5: Drop Decimal Straight Down

27.13 + 12.1 + 2.375

27.13012.1 0002.375

41.605

Example 1

364.23 – 35.905

Example 2

23.1 + 31.625 + 2.64

Tedric ran a mile in 9 minutes. Savina ran in 0.04 fewer minutes. How long did it take Savina to run a mile?