Adding and Subtracting with Base Ten Blocks

What materials are needed for the lesson on adding and subtracting decimals?

• Protractor

• Base 10 blocks

• Compass

• Ruler

In the context of base 10 blocks, what does the 100s frame represent?

• One tenth

• One whole

• One hundredth

• One thousandth

How many equal-sized squares or cubes does the tens rod have?

• 15

• 20

• 10

• 5

What is the sum of 1.6 and 0.13 when using base 10 blocks?

• 1.93

• 1.83

• 1.73

• 1.63

When adding 2.09 and 0.64, what is the resulting sum?

• 2.93

• 2.83

• 2.73

• 2.63

In the subtraction problem 2.41 - 1.3, what is the result?

• 1.31

• 1.21

• 1.41

• 1.11

What is the first step when subtracting 2.24 - 1.5 using base 10 blocks?

• Subtract hundredths

• Combine tenths

• Borrow from the whole

• Add more tenths

How many tenths are equivalent to one whole in base 10 blocks?

• 5

• 10

• 15

• 20

What is the final result of the subtraction problem 2.24 - 1.5?

• 1.04

• 0.74

• 0.94

• 0.84

What is the purpose of borrowing in the subtraction problem 2.24 - 1.5?

• To combine tenths and hundredths

• To convert a whole to tenths

• To convert tenths to hundredths

• To add more hundredths