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Published byMadlyn Adams Modified over 9 years ago
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Decimal Operations Objective: To solve decimal problems correctly by using the correct place values.
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A helpful way to remember addition and subtraction with decimals…
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Placeholders Place Value
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3 8. 1 + 4. 2 4 4 2. 3 4 Line up decimal places What do we put here? Evaluate:38.1 + 4.24 0
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1. 2 1 +. 4 7 6 1. 6 8 6 Line up decimal places What do we put here? Evaluate:1.21 +.476 0
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7. 5 2 + 3. 4 * 1 0. 9 2 Line up decimal places What do we put here? Evaluate:7.52 + 3.4 0
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4 5. 8 - 1 2. 3 2 3 3. 4 8 Line up decimal places What do we put here? Evaluate:45.8 – 12.32 0 7 1
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7 2. 9 - 5 1. 4 8 2 1. 4 2 Line up decimal places What do we put here? Evaluate:72.9 – 51.48 0 8 1
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9 8. 6 - 6 7. 4 3 3 1. 1 7 Line up decimal places What do we put here? Evaluate:98.6 – 67.43 0 5 1
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How do we write the following dollar amounts with a decimal? $5$12 $24$99 $5.00 $12.00 $24.00 $99.00 If you have a whole number where is the decimal located?
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61. 0 +. 4 61. 4 Line up decimal places where’s the decimal? Evaluate:61 +.4
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2 7. 3 + 1 0. 0 3 7. 3 Line up decimal places where’s the decimal? Evaluate:27.3 + 10
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2 3. 0 + 5. 6 2 8. 6 Line up decimal places where’s the decimal? Evaluate:23 + 5.6
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4 3. 7 + 2 4. 0 6 7. 7 Line up decimal places where’s the decimal? Evaluate:43.7 + 24
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