Power Point Exercises
Jan 04, 2016
Power Point Exercises
Names in Numbers
Each letter of the alphabet has a number assigned to it.
A-1 B-2 C-3 D-4 E-5
F-6 G-7 H-8 I-9 J-0
K-1 L-2 M-3 N-4 O-5
P-6 Q-7 R-8 S-9 T-0
U-1 V-2 W-3 X-4 Y-5
Z-6
Directions
Write a heading on your first page.
Name Date
Math
Write your first and last name on the first line
Use the code to write your name in numbers !
Write your first and last names separately.
Place value
Part 2: Label the left column of your page.
1. What number is in the tens place?
2. What number is in the thousands place?
3. What number is in the ten thousands place?
4. In you last name, what number is in the millions place?
5. What number is in the thousandths place in your last name?
6. Write both of the numbers (first and last name) in expanded form.
7. Compare your numbers with your partner. Put them in order from least to greatest.
Working with trillions
•Numbers are read in periods, or groups of three numbers. (ones, tens, thousands)•Each place value is 10 times the one after it: 1,000 is 1o times 100.•100,000 (one hundred million is 10 times ______________
1-2 Writing numbers in expanded form
3000 is 3 times _______
50,000 is 5 times ________
You can write in expanded form 2 ways:
62,500 is (6x10,000) + (2x1,000) + (5x100)
OR: 60,000 + 2,000 +500
In copybooks: Do 1, 5, 9, 11, 21, 23
IMPORTANT: All work must be shown when writing in copybooks.
Properties of Addition
• Commutative: a +b=b+a
+ = = +
Associative: (a+b) +c = a + (b+c)
(1 +3) + 5 = 1 + (3 +5)
Identity : a + 0 = a
+ 0 =
Zeroes in subtraction
REMEMBER: 2,000 = 1 thousand, 9 hundreds, 9o tens, and 10 ones.
2000 – 1 = 1,999. So drop a digit, carry a one!
Inverse Operations
Addition and Subtraction are OPPOSITES or INVERSE operations
One “undoes the other”
EX: 100 + 50 – 50=100
3.75 -1 +1= 2.75
Inverse operation
Sam started out the day with some money. His grandmother then gave him $12. He now has $20. How much did Sam start out with?
How would you solve this problem?
___ +12=20.
The amount left and the amount spent = _____
12 + 8=20. We have our answer! Sam started out with $8.
Inverse Operations
Angie saved some money. She spent $12.52 of it on a new bike tire. She has $9.21 left. How much money did Angie save?
How would you write out the problem?
? - $12.52= $9.21
$9.21 + $12.52= $21.73
Angie had saved $21.73
Problem Solving!!!
Imagine: Picture the problem
Name: What are your facts?
Think: Look at the facts. What information is needed?
What information is not needed?
• Compute: Do the work!
Check:
Imagine
Name facts
Think ( about facts)
Compute
Check
INTCC: I never trip crazy cousins.
Write a related sentence
Example: 32,15, 47:
Answer: 32+15=47; 47-15=32 47-32=15
Write related sentences for the following:
1. 29, 54, 8 2. $6.27, $3.49, $9.763.
3. 532, 99, 631
Use a related sentence
4. ? – 62=38 5. ?-17=50
6. 27 + ? =75 7. 198- ?=120
8. a +25=42 9. 36 +?62
10. x-106=98