What is the main focus of today's lesson?

• Subtraction with regrouping

• Subtraction using the standard algorithm without regrouping

• Multiplication using expanded form

• Addition using the standard algorithm

What was the method used in the previous lesson to teach subtraction?

• Graphical method

• Mental math

• Standard algorithm

• Expanded form

In the standard algorithm, what is the first step when setting up a subtraction problem?

• Start subtracting from the left

• Write the larger number on top

• Write the smaller number on top

• Line up the numbers randomly

Why is it important to understand place values in the standard algorithm?

• To memorize the steps

• To avoid using expanded form

• To make the process longer

• To ensure correct subtraction of each digit

What should you do if the digit on top is larger than the digit below in the standard algorithm?

• Switch the numbers

• Add 10 to the top digit

• Subtract directly

• Stop and start over

What is a common mistake when lining up numbers in the standard algorithm?

• Writing numbers too small

• Not aligning the place values correctly

• Starting subtraction from the left

• Using too much space

In the practice problem, what is the result of subtracting 9 from 6?

• 3

• 1

• 0

• Cannot be done

What is the benefit of using the standard algorithm over expanded form?

• It is more accurate

• It is quicker

• It is easier to memorize

• It requires more steps

What should you do if you find a mistake in your subtraction using the standard algorithm?

• Ignore it

• Recheck the alignment of place values

• Start over with a new problem

• Ask someone else to solve it

How can visualizing base 10 blocks help in subtraction?

• It makes the process slower

• It is not helpful at all

• It helps in understanding place values

• It is only useful for addition