Adding and Subtracting Decimals
Learn how to add and subtract decimals effectively with this easy-to-follow guide. Understand the significance of lining up decimals and using placeholders for accurate computations. This resource provides clear examples, such as adding decimals like 9.8 and 9.7, as well as subtracting decimals, demonstrating methods to ensure precision in your calculations. With practice problems and tips, you will master adding and subtracting decimals in no time. Perfect for students and anyone looking to strengthen their decimal skills!
Adding and Subtracting Decimals
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Presentation Transcript
Adding and Subtracting Decimals Textbook page 102
How do I add or subtract decimals? You can add or subtract decimals the same way you would whole numbers – only you must line up the decimals!
Example 1:Adding Decimals 9.8 + 9.7 + 9.425 + 9.85 9.800* line up 9.700decimals 9.425 * use zeros as + 9.850placeholders 38.775 ADD, remembering the decimal
Example 2:Subtracting Decimals 10 – 9.85 * line up decimals 10.00* use zeros as - 9.85placeholders 0.15 SUBTRACT, remembering the decimal
Example 3:Evaluate 7.52 – s for each value of s. (A) s = 2.9 7.52 – 2.9 * line up 7.52 decimals - 2.90* use zeros as 4.62 placeholders (B) s = 4.5367 7.52 – 4.5367 * line up 7.5200decimals - 4.5367* use zeros as 2.9833 placeholders
