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Adding and Subtracting Decimals. Why Do We Need Decimals? It helps makes things exact!

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Presentation on theme: "Adding and Subtracting Decimals. Why Do We Need Decimals? It helps makes things exact!"— Presentation transcript:

1 Adding and Subtracting Decimals

2 Why Do We Need Decimals? It helps makes things exact!

3 Why Do We Need Decimals? Money: One dollar and thirty two cents is the same thing as Distance: Exactly how many miles is it from your house to school? (You couldnt say without decimals!)

4 Adding Decimals The problem: = ___?___

5 Adding Decimals is easy if you keep your work neat! Step 1: Line up the decimal points! Write zeros as place holders, if necessary

6 Step 2 Step 2: Add the hundredths. Regroup if necessary

7 Step 3 Step 3: Add the tenths. Regroup if necessary

8 Step 4 Step 4: Add the ones, then the tens. Place the decimal point! = 84.68

9 The end!


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