Adding Positive and Negative Decimals

This video tutorial explains how to add positive and negative decimals by following the same rules as adding integers. It covers aligning decimal points, adding numbers with the same signs, and subtracting when signs differ. The tutorial includes several examples, such as adding positive decimals, adding decimals with different signs, and real-world scenarios like calculating total costs and movie earnings.

What is the first step in adding decimals?

• Align the decimal points vertically

• Add the absolute values

• Determine the sign of the numbers

• Carry over the one

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If two numbers have different signs, what operation do we perform?

• Multiplication

• Division

• Addition

• Subtraction

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What sign does the result have when adding two negative decimals?

• Depends on the absolute values

• Negative

• Zero

• Positive

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How do you determine the sign of the result when adding decimals with different signs?

• Always positive

• Always negative

• Sign of the number with the smaller absolute value

• Sign of the number with the larger absolute value

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When adding decimals, where should the decimal point be placed in the answer?

• Anywhere as long as it's present

• Aligned with the decimal points in the problem

• At the end of the number

• Based on the largest number

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What is the result of adding 23.85 and 1.64?

• 25.49

• 22.21

• 24.51

• 26.49

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What is the result of subtracting 7.12 from 9.92 when they have different signs?

• 2.8

• -2.8

• 17.04

• -17.04

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CCSS.7.NS.A.1C

What is the final result when adding -18.2 and -10.8?

• 29.0

• -29.0

• 28.0

• -28.0

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How much did Jim pay in total for his online order?

• $144.95

• $159.95

• $129.95

• $144.00

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What was the total amount made by the top three US movies in 2019?

• 1.85 million

• 1.52 billion

• 1.85 billion

• 2.85 billion

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