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Chapter 5 Decimals 5-4 Adding Decimals The procedures for adding decimals is nearly the same as for adding integers. The only difference is that you must align the decimal points in order to make sure you are adding the same place values — ones to ones, tenths to tenths, hundreds to hundreds, hundredths to hundredths, and so on. Procedure | | Step 1: Write the decimal values in vertical form, aligning the decimal points. 
Note: Aligning the decimal points automatically aligns the place values—ones with ones, tenths with tenths, and hundredths with hundredths. | Step 2: Add the values in the same way you would add any column of numbers, placing the decimal point directly in line with the decimal points in the addends. 
| Example Add 1.2 and 4.3 | The Problem | 1.2 + 4.3 = ? | Step 1: Write the decimal values in vertical form, aligning the decimal points vertically. | 1.2
+ 4.3 | Step 2: Add the columns, placing the decimal point directly in line with the decimal points in the addends. | 1.2
+ 4.3
5.5 | | The Solution | 1.2 + 4.3 = 5.5 | Example Add 4.28 and 1.6 | The Problem | 4.28 + 1.6 = ? | Step 1: Write the decimal values in vertical form, aligning the decimal points vertically. | 4.28
+ 1.6
| Step 2: Add the columns, placing the decimal point directly in line with the decimal points in the addends. | 4.28
+ 1.6
5.88 | | The Solution | 4.28 + 1.6 = 5.88 | Example Add 0.26 and 12.48 | The Problem | 0.26 + 12.48 = ? | Step 1: Write the decimal values in vertical form, aligning the decimal points vertically. | 0.26
+12.482
| Step 2: Add the columns, placing the decimal point directly in line with the decimal points in the addends. | 0.26
+12.482
12 .742 | | The Solution | 0.26 + 12.48 = 12.742 | Examples and Exercises Use these interactive examples and exercises to strengthen your understanding and build your skills: | |
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