Adding and Subtracting Decimals Small Group Lesson 3

Front

What is the process of adding decimals?

Back

To add decimals, align the numbers by the decimal point and add each column starting from the right, carrying over if necessary.

Front

What is the process of subtracting decimals?

Back

To subtract decimals, align the numbers by the decimal point and subtract each column starting from the right, borrowing if necessary.

Front

Find the difference: 7.05 - 4.6

Back

2.45

Front

The Bell family traveled and drove 10.9 hours; then 8.6 hours; then 12.4 hours. What is the sum?

Back

31.9 hours

Front

Calculate: 2.98 + 5.3

Back

8.28

Front

Add: 55.78 + 4.6

Back

60.38

Front

Find the sum: 32.15 + 24.15

Back

56.30

Front

What is a decimal?

Back

A decimal is a fraction expressed in a special form, where the denominator is a power of ten, represented with a decimal point.

Front

What does it mean to carry over in addition?

Back

Carrying over is the process of transferring a value from one column to the next when the sum exceeds the base value (like 10 in base 10).

Front

What does it mean to borrow in subtraction?

Back

Borrowing is the process of taking 1 from the next left column to help subtract when the top digit is smaller than the bottom digit.