Subtracting Numbers within 100 Using Base 10 Blocks

This video tutorial teaches how to subtract numbers within 100 using base ten blocks. It begins with an introduction to base ten blocks and place value, explaining how numbers are represented and the importance of understanding place value. The tutorial provides examples of subtraction, including 47 - 32, 54 - 26, and 81 - 48, demonstrating the process of regrouping when necessary. The video emphasizes the importance of understanding the value of each digit in a number and how to break apart groups of ten to facilitate subtraction.

What do 10 individual cubes represent in base ten blocks?

• A single unit

• A group of 1000

• A group of 10

• A group of 100

In the number 267, what is the value of the digit 6?

• 60

• 6

• 6000

• 600

Which of the following represents the same amount as 3 tens and 2 ones?

• 4 tens and 12 ones

• 2 tens and 12 ones

• 5 tens and 2 ones

• 1 ten and 22 ones

What is the result of subtracting 32 from 47?

• 25

• 15

• 10

• 35

Why can't you directly subtract 6 ones from 4 ones in 54 - 26?

• Because 6 ones are equal to 4 ones

• Because 4 ones are greater than 6 ones

• Because 6 ones are greater than 4 ones

• Because 4 ones are equal to 6 ones

What is the result of subtracting 54 from 26 after regrouping?

• 48

• 38

• 18

• 28

After regrouping, what is 81 represented as to subtract 48?

• 8 tens and 1 one

• 6 tens and 21 ones

• 7 tens and 11 ones

• 9 tens and 1 one