This video tutorial teaches how to add decimals using base-ten blocks. It begins with a review of representing whole numbers with base-ten blocks and extends this concept to decimals. The tutorial provides examples and practice problems, demonstrating how to combine tenths and hundredths to form whole numbers and decimals. By the end, viewers will understand how to visually and conceptually add decimals using base-ten blocks.

What does a set of 100 squares represent in base-ten blocks when dealing with decimals?

• One thousandth

• One hundredth

• One whole unit

• One tenth

In the example of adding 0.35 and 0.25, what is the result of adding the hundredths?

• Five tenths

• One whole unit

• One tenth

• Two tenths

How many tenths are there in the sum of 0.35 and 0.25 using base-ten blocks?

• Four tenths

• Seven tenths

• Five tenths

• Six tenths

When adding 1.15 and 2.06, what does the zero in 2.06 represent?

• No whole units

• No hundredths

• No thousandths

• No tenths

What is the final sum of 1.15 and 2.06 when using base-ten blocks?

• 3.41

• 3.11

• 3.21

• 3.31