Today’s Plan: -Warm up and correct Homework -Add and Subtract Decimals 11/30/10 Add and Subtract Decimals Learning Target: -I can add and subtract decimals. Entry Task One of the coolest summers on record in the Midwest was in The average summertime temperature that year was 66.8°F. Normally, the average temperature is 4°F higher than it was in What is the normal average summertime temperature in the Midwest?

Today’s Plan: -Warm up and correct Homework -Add and Subtract Decimals 11/30/10 Add and Subtract Decimals Learning Target: -I can add and subtract decimals. Correct Assignment: Page 176 #12-19, 26-34

Course Adding and Subtracting Decimals One of the coolest summers on record in the Midwest was in The average summertime temperature that year was 66.8°F. Normally, the average temperature is 4°F higher than it was in To find the normal average summertime temperature in the Midwest, you can add 66.8°F and 4°F.

Course Adding and Subtracting Decimals Use zero as a placeholder so that both numbers have the same number of digits after their decimal points. Add each column just as you would add integers. Line up the decimal points The normal average summertime temperature in the Midwest is 70.8°F.

Course Adding and Subtracting Decimals Add. Estimate to check whether the answer is is reasonable. A Line up the decimal points. Use zero as a placeholder Add. Estimate = is a reasonable answer. Additional Example 1A: Adding Decimals

Course Adding and Subtracting Decimals Add. Estimate to check whether the answer is is reasonable. B Line up the decimal points. Use zeros as placeholders Add. Estimate = is a reasonable answer. Additional Example 1B: Adding Decimals

Course Adding and Subtracting Decimals Add. Estimate to check whether the answer is is reasonable. A Line up the decimal points. Use zero as a placeholder Add. Estimate = is a reasonable answer. Try This: Example 1A

Course Adding and Subtracting Decimals Add. Estimate to check whether the answer is is reasonable. B Line up the decimal points. Use zeros as placeholders Add. Estimate = is a reasonable answer. Try This: Example 1B

Course Adding and Subtracting Decimals Subtract. A – Line up the decimal points. – Subtract. Additional Example 2: Subtracting Decimals B. 28 – Use zeros as placeholders. – Subtract Line up the decimal points.

Course Adding and Subtracting Decimals Subtract. A – Line up the decimal points. – Subtract. Try This: Example 2 B. 34 – Use zeros as placeholders. – Subtract Line up the decimal points.

Today’s Plan: -Warm up and correct Homework -Add and Subtract Decimals 11/30/10 Add and Subtract Decimals Learning Target: -I can add and subtract decimals. Add and Subtract Decimals Worksheet (No calculators today)