Math Rules!

1st always put in the MONEY

2nd put in the operation       ( +    -    X   look for WORDS or think ideas)

3rd put in the "other number"

4th if there is a % PUSH IT   If there is not, push =

 

OFF

Mr. Timm bought a new pair of tennis shoes. The price was $39.88 BUT they were on sale for 15% OFF

Change or Difference

Mr. Timm paid the cashier with a $50.00 bill. How much CHANGE will he get back? (you put the BIG number in, subtract the small number out, push the = sign, that's what it's all about...you do the hokey pokey....

OF

X

How much is 18% OF $49.88 ~ You put the money in....push X (of) the other number (18) then if there is a %, push it!
ON

X

Commission ON sales

JUST

X

How much is JUST (X) the tip?

How much is JUST (X) the sales tax?

How much for a whole bunch?

X

Mr. Timm wants to purchase a pop for every student in class. He has 31 students and each pop is .75  How much will it cost (whole bunch X)?
How much for ONE? (unit price)

Meijer has a 12 pack of pop on sale for $2.88 how much is the unit price or how much for ONE?

HALF (divided by 2 =)

2 =

Mark and Tara earned $48.00 for shoveling show. They get to split it. They each get half. How much is half?
INCLUDING SALES TAX

+    6    %

INCLUDING A TIP

+     15    %

MONEY AND HOURS

$    X     H    =

TIME AND A HALF MULTIPLY "OVERTIME HOURS BY 1.5
15 MINUTES 1/4 HOUR .25
30 MINUTES 1/2 HOUR .50
45 MINUTES 3/4 HOUR .75
JUST A TIP

X   15   %

JUST sales tax

x    6     %

A neat trick when trying to find 10% of a price....simply move the decimal ONE Place to the left ($438.00  ~ 10% =$43.80)
When ROUNDING...underline the first two numbers on the right side of the decimal...look at the THIRD number to see if it is a "magic number" (5, 6, 7, 8, or 9), if it is...dump a penny on the guy next door and it goes UP one penny!....if it is NOT a magic number....TRASH IT!
Power of "10"  Add numbers that equal 10 ~ I say 6, YOU say 4      I say 9, you say 1   THEN you must always carry one to the guy on the left....(that number goes up by one). Example: you spend .48 at the store and pay with a dollar....I say 8 YOU say 2  The 4 goes up to a 5     I say 5 YOU say 5   The change you have coming back is .52  The only exceptions are when you get to WHOLE numbers ending in a zero such as 40....then you count up to 100!