Do Now
Item
Pennant
Bumper
Sticker
Magnet
Price
$2.49
$1.79
$0.89
If Miguel buys two pennants, two bumper stickers, and
four magnets, how much in dollars will he spend for all
the items?
$12.12
9/16/2014 1-1 E. Multiplying Decimals by Decimals
To multiply decimals by decimals
1. place the number with the most
digits on top
2. “lasso” the decimals until the end
3. multiply as usual
4. plug in to the final product.
1) 4.2 × 6.7
28.14
2) 3.6 × 0.05
0.18
3) 0.014 × 3.7
0.0518
Check for reasonableness with estimation!
Exit Ticket
1) A certain car can travel 28.45 miles with one
gallon of gasoline. The gasoline tank can hold
11.5 gallons. How many miles can this car
travel on a full tank of gas?
327.175 miles
2) A nutrition label indicates that one serving of
apple crisp oatmeal has 2.5 grams of fat. How
many grams of fat are there in 3.75 servings?
9.375 g
3) 4.8 × 3.2
15.36
4) 5.81 × 4 .2
24.402
“Card Cowboy Chaos”
Round 1- Pick 2 cards. Create a whole number & decimal.
Pick 2 again to create another whole number & decimal.
Multiply and record your answer.
Round 2- Pick 3 cards. Create a double digit and decimal.
Then pick 2 cards to create a decimal that is in
hundredths place.
Round 3- Pick 2 cards. Create a decimal that is in the
hundredths place. Then pick 1 card to create a decimal in
the tenths place.
• Partner- check your opponents work!
• The partner with the largest product at the end of
activity wins match.
Let’s Go Shopping!
• Pick an item you would love to have.
• Research the cost of that item.
• Then figure out how much it would cost to
buy with a 7% sales tax (7% = 0.07) That’s
NJ state tax!
• With a 12% sales tax (0.12)
• With a 14.5% sales tax (0.145)
Homework
• Pg. 39 #1-40 Evens