Math for Life and Food Service

1
Math for Life and Food Service

• Chapter 1 Objectives
• Fraction Review
• Multiples
• Adding Subtracting
• Decimals Rounding

2
Adding Subtracting LIKE Fractions

• STEPS1) Add or Subtract numerators
• 2) Keep denominators the same
• 3) Simplify

3
SOLVE

• STEPS1) Add or subtract numerators
• 2) Keep denominators the same
• 3) Simplify

4
Multiples

• Multiples of 2
• 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26,
• 28, 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, 50,
  
• Multiples of 5
• 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55,

5
Least Common Multiple

• Find the LCM of 8 and 6 using multiples
• 8 8 , 16 , 24 , 32 , 40 , 48
• 6 6 , 12 , 18 , 24 , 30 , 36 , 42 , 48
• LCM (LCD) 24

6
Writing Equivalent Fractions

• To add subtract UNLIKE fractions, you need to
  write equivalent fractions.
• What you do to the denominator, you must do to
  the numerator.

7
Solve
8
Adding Unlike Fractions

• Find the LCM or LCD ?
• Write equivalent fractions ?
• Add the numerators ?
• Simplify ?

20
9
Subtracting Unlike Fractions

• Find the LCM or LCD ?
• Write equivalent fractions ?
• Subtract the numerators ?
• Simplify ?

24
10
Solve

• 1) 13/27
• 2) 3/60 1/20
• 11/8
• 1 3/8 lb.

1) 2) 3) Martel mixes 3/4 pound of
chocolate-covered almonds with 5/8 pound of
coconut creams in a gift container. How much does
the mixture weigh?
11
Adding Subtracting Mixed Numbers

• Add or subtract fractions first
• Add or subtract whole numbers
• SIMPLIFY

12
Adding Subtracting Mixed Numbers
13
Adding Subtracting Mixed Numbers
?
14
Adding Subtracting Mixed Numbers
15
Solve
2)
1)
3 25/24 4 1/24
60 25/30 60 5/6
3) A Supreme gift box has 2 1/4 lbs of nuts and
3 1/2 lbs of candy. A Deluxe box has 1 3/8 lbs
of nuts and 4 1/4 lbs of candy. How much heavier
is the Supreme gift box over the Deluxe?
Supreme ? 2 1/4 3 1/2 5 3/4 Deluxe ?
1 3/8 4 1/4 5 5/8 Difference of 1/8
16
SOLVE

• A nacho recipe calls for 1/3 cup cheddar cheese
  and 1/2 cup jalapeno cheese. Find the total
  amount of cheese in the recipe.

17
SOLVE

• A recipe for brownies calls for 1 2/3 cups of
  sugar. If you are doubling the recipe, how much
  sugar do you need?

18
SOLVE

• A recipe for chocolate chip cookies calls for 2
  1/2 cups of flour. If you are making
• 1 1/2 recipes, how many cups of flour are needed?

19
SOLVE

• A stack of 5/8 inch-wide sheetrock has a height
  of 41 7/8 inches. How many sheets of sheetrock
  are in the stack?

20
Using the Order of Operations

• 1
• 16/21
• 28/24 3
• ? 28/24 1/3
• ? 28/72 7/18

21
Rounding Decimals

• Find the number.
• Look right next door.
• 4 or less just ignore.
• 5 or more, add 1 more.
• (5 high, round up or 5 below, stay the same.)
• Always round money to the nearest hundredths
  place, unless otherwise stated.

22
Round to the nearest tenth place.
Find your number.
4. 8 7 1
Circle the number in the tenths place.
23
Round to the nearest tenth place.
Look to the right.
4. 8 7 1
24
Round to the nearest tenth place.
5 or more, add 1 more.
1
4. 8 7 1
25
The Answer
4.871 rounded to the nearest tenth place is
4.9
26
SOLVE

• .217654 round to the nearest thousandths
• 18.8217 round to the nearest hundredths
• 714.8671 round to the nearest tens
• 12.7985

• .218
• 18.82
• 710
• 12.80