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DateDescription of Transaction Payment Debit (-) Deposit Credit (+) Balance Jun 24Opening Deposit Jul 4Buy Beach Towel Aug 3School Supplies Aug 30Back to School Dance Sep 12Progress Report Money Mr. Stewart’s Checkbook

DateDescription of Transaction Payment Debit (-) Deposit Credit (+) Balance Jun 24Opening Deposit Jul 4Buy Beach Towel Aug 3School Supplies Aug 30Back to School Dance Sep 12Progress Report Money

3.3 Adding and Subtracting Decimals I can add and subtract decimals and use estimation to check my answers

Adding or Subtracting Decimals What do you do when you are adding or subtracting decimals? Line’em Up Drop’em Down

Think about it…. Why is it important to line up your decimals? Why do we add zeros?

3.3 Adding and Subtracting Decimals I can add and subtract decimals and use estimation to check my answers

Adding or Subtracting Line up decimals. Add zeros as place holders. Add. Bring the decimal down from the problem = ?

Subtracting Example: 5 – 0.64 = ? Line up decimals. Add the decimal point to the whole number 5. Add zeros as place holders. Subtract. Bring the decimal down from the problem

Estimate by rounding to the nearest whole number Estimate by rounding to the nearest whole number My estimation is = 28 Find the sum of 9.7, 9.3, and 9.45.

Additional Example 1A Continued Add Align the decimal points.Use zeros as placeholders.Add. Then place the decimal point. Since is close to the estimate of 28, the answer is reasonable.

Examples: 1.12 – = ? = ? = ? 4.88

Estimation Why is estimation a good way to check your answers? How else could you check your answers?

Learning Centers Showdown!

Problem Solving Samantha is balancing her checkbook. The balance from her last statement was $ Since than she made 1 deposit of $42.05 and wrote 1 check for $ How much money does Samantha have left in her account?

You go to Falcon Flight and buy popcorn for $1.35, a soda for $1.20 and a slice of pizza for $2.33. You pay with a $5.00 bill. Write an equation to show how much change you will receive. Let c = the change you get back $5.00 – ( ) = C c = 5.00 C=$0.12

Examples: = ? = ? = ? 56.61

Examples: – = ? – 3.56 = ? 4.44