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find the discount
find the sales tax
adding with decimals
subtracting with decimals
sales tax and discounts
100
20% off $17.99 Step #1. decimal X original price Step #2. subtract the discount from the original amount
answers: $14.39
100
$13.78 and 5% tax
$14.47
100
115.48 - 6.92 =
$122.40
100
$39.00 - 9.75 =
$29.25
100
When you find a discount do you add, subtract, multiply or divide?
subtract
200
40% off $ 7.25 Step # 1 multiply Step # 2 subtract (remember to line up the decimals)
$4.35
200
%53.00 and 6% tax
$56.18
200
$349 + $22.69 =
$371.69
200
$35 - $14 =
$21
200
when you find sales tax do you add, subtract, multiply or divide the original price?\\hint: step # 2
add
300
10% of $358.79
$ 322.91
300
$18.45 and 4.5% tax
$19.28
300
300 - 160.50 =
$139.50
300
16.99 - .86 =
$16.14
300
Explain how to find where the decimal goes when you are multiplying a number like 3.2 X 2.5 =
There are 2 places (numbers) behind the decimal in the problems, so you move the decimal 2 places to the left in your answer.
400
5% off $16.70
$15.86
400
$22.65 and 7% tax
$24.24
400
620.75 - 25.25 =
$595.50
400
56.18 -3.18=
$53.00
400
When adding or subtracting decimals what must you do before you fill in the numbers? Hint: like buttons on a shirt
line up the decimals
500
80% off $ 9.95
$ 1.99
500
Charlene's lunch bill was $18.70. Estimate the total cost for lunch with 5% tax and a 15% tip.
$22.58
500
190 - 16.77 =
$173.23
500
167.45 - 28.54 =
$138.91
500
double jeopardy worth double points What must you do for all of your problems on tonight's homework for full credit?
SHOW YOUR WORK