# First Day WORKSHOP ALA: Pre-Algebra Unit 1 Whole Numbers.

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First Day WORKSHOP ALA: Pre-Algebra Unit 1 Whole Numbers

You be the judge! TRUE or FALSE?

5 > 3

4 < 4

Population of Missouri > Population of Illinois 12,830,6325,988,927

Number of chickens in the world < Number of people in the world

Number of chickens in the world < Number of people in the world 19,000,000,000 7,035,000,000

IMPORTANT WORDS

SUM: the answer you get when you add 4 + 7 = 11

FACTORS: numbers that get multiplied 4 x 7 = 28

PRODUCT: the answer you get when you multiply 4 x 7 = 28

DIFFERENCE: the answer you get when you subtract 7 - 4 = 3

QUOTIENT: the answer you get when you divide 8 ÷ 4 = 2

EXPONENTS 5 x 5 x 5 x 5 x 5 x 5 x 5 x 5 5858

5252 5252 25

2323 2323 8 8

1515 1515 1 1

4242 4242 16

Heart AttackParentheses Head InjuryExponents LaborMultiply/Divide Cut FingerAdd/Subtract A Story to Introduce Order of Operations -- Cut finger -- Head injury -- Heart attack -- Labor

PLEASE EXCUSE MY DEAR AUNT SALLY

10 + 3 x 2 16

10 – 3 + 2 9 9

(7 – 4) 2 9 9

3(7 – 2) 2 75

1 + 3(7 – 2) 2 76

OUR HERO ZERO HERO 0

8674 + 0 8674 ZERO IS THE ADDITIVE IDENTITY. ADDING ZERO TO A NUMBER DOES NOT CHANGE THE NUMBER.

8674 - 0 8674

8674 X 0 0 0 WHEN YOU MULTIPLY BY 0, YOU ALWAYS GET 0.

8674 ÷ 0 UNDEFINED DON’T DO IT!

FACTORS AND MULTIPLES FACTORS OF 10: MULTIPLES OF 10: 2 X 51 X 10 10, 20, 30, 40, 50,...

FACTORS AND MULTIPLES FACTORS OF 2: MULTIPLES OF 2: 2, 4, 6, 8, 10, 12,... 1 X 2 Multiples of 2 are called EVEN numbers! 2 is a PRIME number. Its only factors are 1 and itself.

FACTORS AND MULTIPLES FACTORS OF 6: MULTIPLES OF 6: 2 X 3 1 X 6 6, 12, 18, 24, 30,... 6 is a COMPOSITE number. It has more factors than just 1 and itself.

FACTORS AND MULTIPLES FACTORS OF 20: MULTIPLES OF 20: 2 X 105 X 4 20, 40, 60, 80, 100,... 1 X 20

Which numbers are PRIME? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are PRIME? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are COMPOSITE? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are COMPOSITE? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are neither PRIME nor COMPOSITE? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are neither PRIME nor COMPOSITE? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are EVEN? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are EVEN? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are MULTIPLES of 3? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are MULTIPLES of 3? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are DIVISIBLE by 5? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

Which numbers are DIVISIBLE by 5? 2 1 5 9 12 3 21 11 13 6 7 8 15 17 10

FACTOR TREES : breaking a number down to its PRIME factors

Make a Factor Tree to break the number 100 into its prime factors

MEAN, MEDIAN, and MODE

How many children do you have?

MEAN It’s MEAN to make you find the MEAN! You have to add, then divide!

MEDIAN The median strip is the middle of the road. Write the numbers in order and pick the middle one!

MODE The MOST POPULAR number!

MILITARY TIME

midnight 1:00 AM 2:00 AM 3:00 AM 4:00 AM 5:00 AM 6:00 AM 7:00 AM 8:00 AM 9:00 AM 10:00 AM 11:00 AM 12:00 NOON 1:00 PM 2:00 PM 3:00 PM 4:00 PM 5:00 PM 6:00 PM 7:00 PM 8:00 PM 9:00 PM 10:00 PM 11:00 PM 0000 0100 0200 0300 0400 0500 0600 0700 0800 0900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 2000 2100 2200 2300

1632 4:32 PM

0448 4:48 AM

7:58 PM 1958