Understanding Decimals with Base Ten Blocks

The video tutorial explains how to add decimals using base ten blocks. It defines the flat as one whole, the long as one-tenth, and the bit as one hundredth. The tutorial demonstrates representing the numbers one and twenty-four hundredths and fifty-seven hundredths using these blocks. It then shows how to combine the blocks to find the sum, perform exchanges to simplify the sum, and finally write the result in expanded form. The sum is one and eighty-one hundredths, or 1.81, which is also expressed as 1 + 0.8 + 0.01 in expanded form.

What is the purpose of using base ten blocks in this lesson?

• To multiply decimals

• To visualize the addition of whole numbers

• To find the sum of decimals

• To subtract decimals

How is the number one and twenty-four hundredths represented using base ten blocks?

• One flat, two longs, and four bits

• Two flats, four longs, and one bit

• Two flats, one long, and four bits

• One flat, four longs, and two bits

How many longs are used to represent fifty-seven hundredths?

• Three longs

• Four longs

• Five longs

• Six longs

What happens when you have ten bits in base ten blocks?

• They remain as bits

• They are exchanged for two longs

• They are exchanged for one long

• They are exchanged for one flat

How many longs are there after combining the blocks for the sum?

• Six longs

• Seven longs

• Eight longs

• Nine longs

What is the final sum of one and twenty-four hundredths and fifty-seven hundredths?

• Two and one hundredth

• One and ninety-one hundredths

• One and eighty-one hundredths

• One and seventy-one hundredths

In expanded form, how is one and eighty-one hundredths expressed?

• 1 + 0.8 + 0.01

• 1 + 0.7 + 0.11

• 1 + 0.9 + 0.01

• 1 + 0.8 + 0.1

What is the significance of writing the sum in expanded form?

• It complicates the addition process

• It helps in understanding the multiplication of decimals

• It simplifies the subtraction of decimals

• It provides a clearer understanding of the value of each digit