Estimation

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Estimation? : 

Estimation? What does it mean to estimate? Is an estimate a guess?

Estimation : 

Estimation A “ballpark” answer; close to the exact amount Estimate the following quantities: A. 17 gallons B. 1,982 feet C. 3.92 inches D. 23,872 ounces

Objective : 

Objective Estimate to check whether or not the result of a real-world problem is reasonable.

Computation Vocabulary : 

Computation Vocabulary SUM = ADD PRODUCT = MULTIPLY DIFFERENCE = SUBTRACT HOW MANY/MUCH FOR EACH = DIVIDE

Reviewing Place Value of Decimals : 

Reviewing Place Value of Decimals 203.456 Which digit is in the ones place? Which digit is in the tenths place? Which digit is in the thousandths place?

Reviewing Place Value of Decimals : 

Reviewing Place Value of Decimals 3.01 Which digit is in the tenths place? Which digit is in the ones place?

Rounding Review : 

Rounding Review 203.456 Round the number above to the ones place. 14.56 Round the number above to the tenths place. 789.21 Round the number above to the tens place.

Practice : 

Practice If you have $18, and you want to buy several cans of tennis balls that cost $3.87 per can, you don’t need to find the exact cost to decide how may cans you can buy. Since $3.87 is almost $4, 4 cans will cost a little under $16, and 5 cans will cost almost $20. So you can buy, at most, 4 cans with $18.

$8.00 : 

$8.00 Jacob and Jadon went to the candy store. The jelly beans were $1.84 per pound. They bought 4.2 pounds of jelly beans. Estimate how much money they spent?

480 miles : 

480 miles Tiffani has a car that drives 32.3 miles for every gallon of gas. The tank in her car holds 14.8 gallons of gas. If Tiffani fills her car with gas, estimate how many miles she can drive before she runs out.

No! : 

No! Payton goes to Best Buy with a $20 gift card. He buys a CD for $7.89 and a DVD for $16.07 (both include tax). Does Payton have any money left on his gift card? Estimate to find your answer.

16 feet : 

16 feet Allison wants to place a frame around the border of the following figure. ESTIMATE how much framing material she will need.

No – About $10 : 

Jon received $100 for his birthday. He wants to buy shoes for $46 and a video game for $64. Will Jon have enough money to buy both items? About how much more money will he need? No – About $10

No – About $5 short! : 

Sabrina went shopping and bought milk for $2.44, Colby cheese packages at 3 for $4.99, crackers for $3.23, a pound of meat for $3.74, and a bag of carrots for $0.78. Sabrina brought along a twenty-dollar bill. Does Sabrina have enough money to purchase these groceries? No – About $5 short!

Objective : 

Objective Estimate to check whether or not the result of a real-world problem is reasonable.