Adding Decimals with Base Ten Blocks

What is the purpose of using base 10 blocks in this lesson?

• To divide decimals

• To add decimals

• To multiply decimals

• To subtract decimals

How many single units are needed to represent the number 123 using base 10 blocks?

• 3

• 2

• 1

• 4

What does a set of blocks with ten blocks represent in base 10 blocks?

• One whole unit

• One tenth

• One hundredth

• One thousandth

How many single units are needed to make one whole unit in base 10 blocks?

• 10000

• 1000

• 100

• 10

What is the result of adding 35 hundredths and 25 hundredths using base 10 blocks?

• 0.55

• 0.50

• 0.60

• 0.65

How many tenths are there in the sum of 35 hundredths and 25 hundredths after regrouping?

• 4 tenths

• 5 tenths

• 6 tenths

• 7 tenths

What is the first step in adding 1.15 feet and 2.06 feet using base 10 blocks?

• Add the whole numbers

• Add the tenths

• Add the thousandths

• Add the hundredths

What is the result of adding 1.15 feet and 2.06 feet using base 10 blocks?

• 3.25 feet

• 3.11 feet

• 3.20 feet

• 3.21 feet

How many tenths are there in the sum of 1.15 feet and 2.06 feet after regrouping?

• 4 tenths

• 3 tenths

• 2 tenths

• 1 tenth

What have you learned in this lesson?

• To multiply decimals using base 10 blocks

• To divide decimals using base 10 blocks

• To subtract decimals using base 10 blocks

• To add decimals using base 10 blocks