Understanding Subtraction Concepts

The video tutorial helps Lindy understand how to subtract 853 minus 283 by analyzing different expressions and identifying the correct method. It explains the logic behind breaking down numbers for easier mental calculation. An alternative example is provided, demonstrating how adjusting numbers can maintain the same difference.

What is Lindy trying to figure out in the video?

• How to subtract 853 minus 283

• How to divide 853 by 283

• How to multiply 853 by 283

• How to add 853 and 283

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

In the first option, what mistake is made in the subtraction expression?

• Subtracting 80 instead of 50

• Subtracting 200 instead of 300

• Subtracting 50 instead of 80

• Subtracting 3 instead of 30

Tags

CCSS.2.NBT.B.7

CCSS.3.NBT.A.2

What is incorrect about the second option's subtraction expression?

• It subtracts 20 instead of 200

• It subtracts 800 instead of 80

• It subtracts 3 instead of 30

• It subtracts 50 instead of 5

Tags

CCSS.2.NBT.B.5

Why is the correct option easier to calculate mentally?

• It uses smaller numbers

• It breaks down the subtraction into simpler steps

• It uses addition instead of subtraction

• It involves multiplication

Tags

CCSS.2.NBT.B.5

How is the number 83 broken down in the correct subtraction method?

• Into 50 and 33

• Into 40 and 43

• Into 53 and 30

• Into 80 and 3

Tags

CCSS.7.NS.A.1D

In the new example, what is the key to maintaining the same difference?

• Adding the same number to both numbers

• Subtracting the same number from both numbers

• Multiplying both numbers by the same factor

• Dividing both numbers by the same factor

Tags

CCSS.2.NBT.B.6

What adjustment is made to the number 79 in the new example?

• It is decreased by 2

• It is increased by 1

• It is decreased by 1

• It is increased by 2

What is the new number that 143 is adjusted to in the example?

• 144

• 142

• 143

• 145

Tags

CCSS.2.NBT.B.7

What is the final subtraction expression in the new example?

• 144 minus 80

• 143 minus 80

• 144 minus 79

• 143 minus 79

Tags

CCSS.1.NBT.C.5

Why is it beneficial to adjust both numbers in a subtraction problem?

• It simplifies the calculation

• It changes the result

• It makes the numbers larger

• It makes the numbers smaller

Tags

CCSS.1.NBT.C.5