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