Adding And Subtracting Decimals

Adding And Subtracting Decimals

Learning Objectives:

Understand and Apply Addition and Subtraction of Decimals

Adding and Subtracting Decimals

General Procedure for Adding and Subtracting Decimals:

1.    Write the numbers vertically and line up the Decimal points. Add zeros to the right as needed so each number has the same number of digits to the right of the Decimal point.

2.    Bring the Decimal point down into the Sum or Difference.

3.    Add or Subtract as we normally would.

Adding two Decimals with the same sign:

1.    Add the Absolute Values of the Decimals.

2.    The sign of the sum is the common sign.

Adding two Decimals with different signs:

1.    Find the Absolute Value of the Decimals.

2.    Subtract the smaller value from the larger value.

3.    The sign of the sum is the original sign of the Decimal with the larger Absolute Value.

Subtracting Decimals: Subtracting Decimals is the same as adding the opposite.

Follow the rules for Adding signed numbers.

Hook Questions:

1.      What are the General Procedures to Add and Subtract Decimals?

2.      What are the rules for Adding Signed Numbers?


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