Decimal Addition and Subtraction with Base-Ten Models

What does a flat represent in base ten blocks?

• Thousandths place

• Ones place

• Hundredths place

• Tenths place

When adding decimals, what should you do if the sum of any place value is ten or more?

• Ignore the extra value

• Regroup to the next place value

• Subtract the extra value

• Add it to the next number

In the example of adding 1.37 and 1.85, what is the sum of the hundredths place before regrouping?

• 10

• 13

• 11

• 12

After regrouping the hundredths place in the example, how many hundredths are left?

• 3

• 4

• 2

• 1

What is the sum of the tenths place in the example before regrouping?

• 12

• 10

• 11

• 13

When subtracting decimals, which number do you build using base ten blocks?

• Neither number

• The number being subtracted

• Both numbers

• The first number

In the subtraction example, what do you do if you don't have enough hundredths to subtract?

• Regroup from the tenths place

• Subtract from the ones place

• Skip the subtraction

• Add more hundredths

How many tenths are left after regrouping in the subtraction example?

• 2

• 4

• 5

• 3

What is the final result of subtracting 1.47 from 2.82?

• 1.25

• 1.55

• 1.35

• 1.45

What should you do after completing the practice problems?

• Redo the problems

• Ask the teacher for help

• Ignore the instructions

• Submit your work on Edmodo