Subtraction Concepts and Misunderstandings

The video tutorial teaches how to subtract numbers within 100 using base 10 blocks. It begins with an introduction to base 10 blocks and a review of place value. The tutorial then provides examples of subtraction problems, such as 47 minus 32, 54 minus 26, and 81 minus 48, demonstrating how to break down numbers into tens and ones to facilitate subtraction. The video emphasizes understanding the value of each digit and how to regroup when necessary.

What is the value of the digit 4 in the number 46?

• 0.4

• 40

• 4

• 400

How many ones are there in a group of ten?

• 100

• 1

• 10

• 5

What is a common misunderstanding about the digit 4 in the number 46?

• It is often thought to be 40

• It is often thought to be 0.4

• It is often thought to be 4

• It is often thought to be 400

When subtracting 32 from 47, what is the value of the digit 3 in 32?

• 300

• 0.3

• 30

• 3

What is the result of subtracting 32 from 47?

• 15

• 45

• 35

• 25

In the subtraction 54 minus 26, what is the equivalent of five tens and four ones?

• Three tens and fourteen ones

• Five tens and six ones

• Four tens and fourteen ones

• Four tens and six ones

What is the result of subtracting 54 from 26?

• 18

• 28

• 38

• 48

When subtracting 48 from 81, how is 81 represented to make subtraction easier?

• Six tens and twenty-one ones

• Eight tens and one one

• Seven tens and eleven ones

• Nine tens and one one

What is the result of subtracting 48 from 81?

• 33

• 23

• 53

• 43

What is the main concept taught in this lesson?

• Dividing numbers using base 10 blocks

• Adding numbers using base 10 blocks

• Subtracting numbers within 100 using base 10 blocks

• Multiplying numbers using base 10 blocks