Understanding Addition and Subtraction of Positive and Negative Numbers

The video tutorial explains how to add and subtract positive and negative numbers without using a number line, focusing on the box method. It covers essential rules for handling plus and minus signs, such as converting adjacent plus and minus signs to a minus, and two minus signs to a plus. The box method is introduced as a technique to organize numbers and their signs, allowing for easier calculation. Examples demonstrate how to apply the method to both same sign and different sign numbers, emphasizing the importance of combining like terms and determining the final sign based on the larger number.

What is the main reason for learning to add and subtract positive and negative numbers without a number line?

• To save time when numbers are large

• To make math more fun

• To avoid using calculators

• To improve drawing skills

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CCSS.7.NS.A.1C

What happens when a plus and a minus sign are next to each other in a math problem?

• They turn into a plus

• They remain unchanged

• They turn into a minus

• They cancel each other out

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CCSS.7.NS.A.1C

If you see two minus signs next to each other, what should you do?

• Turn them into a minus

• Ignore them

• Add a parenthesis

• Turn them into a plus

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CCSS.7.NS.A.2A

What is the first step in the box method?

• Draw a number line

• Put numbers in boxes

• Combine like terms

• Convert plus and minus signs

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CCSS.7.NS.A.2A

When using the box method, what do you do with numbers that have the same sign?

• Multiply them

• Ignore them

• Add them together

• Subtract them

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CCSS.7.NS.A.1C

In the box method, what should you do if all numbers are positive?

• Add them and keep the positive sign

• Ignore the signs

• Add them and change the sign to negative

• Subtract them and keep the positive sign

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CCSS.7.NS.A.1C

What is the first step when using the box method with different sign numbers?

• Ignore the signs

• Add all numbers together

• Subtract all numbers

• Combine numbers with the same sign first

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CCSS.7.NS.A.2A

CCSS.7.NS.A.2B

How do you determine the sign of the final answer in the box method?

• By the first number's sign

• By the smallest number's sign

• By the largest number's sign

• By the number of terms

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CCSS.7.NS.A.1C

If you have a negative 15 and a positive 7, what is the result using the box method?

• Positive 22

• Negative 22

• Positive 8

• Negative 8

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CCSS.5.NF.B.5B

What is the final step in the box method?

• Add all numbers

• Divide all numbers

• Multiply all numbers

• Subtract smaller from larger and determine the sign

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CCSS.5.NF.B.5B