Mental Math Addition Techniques

The video tutorial demonstrates a mental math technique for adding numbers, specifically adding 5 to 68. The method involves breaking down the number 5 into 3 and 2, adding 2 to 68 to reach 70, and then adding the remaining 3 to get 73. This approach is explained both conceptually and visually using a number line, offering an alternative way to perform addition in one's head.

What is the main focus of the mental math technique introduced in the video?

• Adding numbers using a breakdown method

• Dividing numbers using estimation

• Multiplying numbers in your head

• Subtracting numbers quickly

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CCSS.2.OA.B.2

CCSS.1.OA.C.6

How is the number 5 broken down to simplify the addition to 68?

• Into 1 and 4

• Into 2 and 3

• Into 3 and 2

• Into 4 and 1

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CCSS.2.NBT.B.5

CCSS.1.NBT.C.4

What is the first step in the detailed addition process described?

• Multiply 68 by 2

• Add 3 to 68

• Subtract 2 from 68

• Add 2 to 68

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CCSS.1.NBT.C.5

After reaching 70 by adding 2 to 68, what is the next step?

• Add 5

• Multiply by 3

• Add 3

• Subtract 3

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CCSS.2.MD.B.6

CCSS.1.NBT.C.4

What is the final result of adding 5 to 68 using the mental math technique?

• 75

• 74

• 73

• 72

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CCSS.5.NBT.B.7

What alternative method is introduced to visualize the addition process?

• Using a calculator

• Drawing a number line

• Writing equations

• Using a pie chart

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CCSS.2.MD.B.6

CCSS.1.NBT.C.4

On the number line, what is the first step to add 5 to 68?

• Add 3 to reach 71

• Add 2 to reach 70

• Subtract 2 to reach 66

• Add 5 directly

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CCSS.2.MD.B.6

CCSS.1.NBT.C.4

After reaching 70 on the number line, what is the next step?

• Multiply by 3

• Add 3

• Subtract 3

• Add 5

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CCSS.1.OA.A.1

What is the purpose of breaking down numbers in mental math?

• To divide numbers quickly

• To make subtraction easier

• To simplify multiplication

• To reach round numbers easily

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CCSS.5.NBT.B.7

What is the benefit of using a number line for addition?

• It speeds up multiplication

• It helps visualize the process

• It simplifies division

• It makes subtraction easier

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CCSS.5.NBT.B.7