Exploring Adding and Subtracting Rational Expressions

This video tutorial covers the use of base 10 blocks to model the addition and subtraction of decimals. It explains how to use these models to understand place value and regrouping in decimal operations. The tutorial provides several examples, including adding and subtracting decimals with different place values, and concludes with instructions for completing an assignment.

What is the sum of 1.4 and 0.7 when using base 10 blocks?

• 2.1

• 2.01

• 1.11

• 1.07

How do you handle having more than nine tenths in a place value?

• Leave it as is

• Regroup ten tenths as one whole

• Subtract the extra tenths

• Add more tenths

What is the result of 1.16 minus 0.89 using base 10 blocks?

• 0.27

• 0.17

• 0.26

• 0.28

When subtracting decimals, what do you do if you don't have enough in a place value?

• Skip the subtraction

• Regroup from the next higher place value

• Add more to the place value

• Subtract from the next lower place value

What is the sum of 1.5 and 2.7?

• 4.3

• 4.4

• 4.2

• 4.1

What is the result of 2.42 minus 1.24?

• 1.16

• 1.17

• 1.19

• 1.18

How do you handle more than nine tenths when adding 3.15 and 0.92?

• Subtract the extra tenths

• Regroup ten tenths as one whole

• Leave it as is

• Add more tenths

What is the result of 1.26 minus 0.83?

• 0.43

• 0.42

• 0.41

• 0.44

What can you conclude when adding two decimals each greater than 0.5?

• The sum will be less than 1

• The sum will be exactly 1

• The sum will be a whole number

• The sum will be less than 0.5

What is the equation represented by the sketch with three ones, five tenths, and four hundredths added to one one, six tenths, and three hundredths?

• 4.57

• 5.17

• 5.07

• 4.67