Subtraction Techniques and Examples

This video introduces an alternative subtraction method that differs from the traditional regrouping technique. The instructor demonstrates this method through examples, emphasizing mental computation and understanding the underlying principles of numbers. The method involves subtracting from the hundreds place and moving forward without regrouping, offering a different approach to subtraction that some may find unconventional.

What is the main focus of the video tutorial?

• Understanding a different subtraction method

• Exploring advanced algebra concepts

• Learning a new multiplication technique

• Practicing addition with regrouping

Tags

CCSS.RI.4.3

CCSS.RI.6.3

CCSS.RI.6.5

CCSS.RI.7.5

CCSS.RI.8.3

Why does the instructor caution viewers about the method shown?

• It might not be approved by everyone

• It is a widely accepted method

• It is a method used in all schools

• It is the only way to subtract numbers

In the example with 301, what is the first step in the subtraction process?

• Subtract 9 from 301

• Subtract 200 from 301

• Subtract 60 from 301

• Subtract 100 from 301

Tags

CCSS.2.NBT.B.8

After subtracting 100 from 301, what is the next step?

• Subtract 200

• Subtract 9

• Subtract 60

• Subtract 30

Tags

CCSS.2.NBT.B.8

What is the result of 141 minus 9 in the example?

• 132

• 140

• 139

• 130

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

In the second example, what is the result of 900 minus 200?

• 600

• 800

• 500

• 700

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CCSS.1.NBT.C.4

CCSS.2.MD.B.6

What is the result of 71 minus 8 in the second example?

• 65

• 62

• 63

• 64

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CCSS.2.OA.A.1

In the final example, what is the result of 72 minus 8?

• 60

• 66

• 62

• 64

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CCSS.1.NBT.C.4

CCSS.2.MD.B.6

What is the final result of 641 minus 8 in the last example?

• 633

• 634

• 632

• 631

Tags

CCSS.7.NS.A.1C

What is emphasized about the subtraction technique in the video?

• It is not useful for large numbers

• It involves mental computation

• It is the only correct method

• It requires regrouping

Tags

CCSS.7.NS.A.1C