1. Chapter 1 Topics include: Intro to Whole Numbers
Rounding Whole Numbers
Adding and Subtracting
Multiplying
Dividing
Order of Operations

2. Intro to Whole Numbers Place Value
1,234,678

3. Rounding Whole Numbers
Round 85,291 to the nearest hundred.
Identify the place digit
Look at the digit to the right (circle)
Is the circled value 5 or greater?
If yes, round your place digit up 1
and replace the rest of number with 0’s
If no, leave the place digit alone and
replace the rest of numbers with 0’s
85,291
YES
85,300

4. Let try some examples:
Round the following numbers to the nearest ten.
5,321
481
501
1,499

5. Round the following numbers to the nearest ten. 5,321 481 501 1,499
Let try some examples:
Round the following numbers to the nearest ten.
5,321
481
501
1,499
5,321
5,320
481
480
501
500
1,499
1,500

6. Try these:
Round each factor to its largest place value and multiply.
632 x 750
600 x 800 =
482 x 321
500 x 300 =

7. Adding Steps Line up numbers Add each column
Example: Add
132
457
+193 1 1 7 8 2

8. Subtracting Steps Line up numbers Subtract each column
Example: Subtract 98
-32 66

9. Remember Borrowing?? Example: Subtract 310-150 310 Borrowing 310 2 1 1 6

10. Multiplying Single Digits Steps
Multiply each digit in the top number
Example:
326
X ** If multiplying is hard for you make yourself some flashcards to use for practice. 1 3 1 6 3

11. Multiplying by a Two or More Digit Number Steps
Find the first partial product
Find the second partial product.
Continue until digits are used up.

12. Example 1: Multiply 125 x 42
125
X 42
250
(Don’t forgot to use a zero)
5250

13. Example 2: Multiply 237 x 122
237 X
474
4740
+23700
28914

14. Dividing Steps Set up your division bar
Find the first partial dividend
Divide
Multiply
Subtract
Bring down the next digit
Repeat process until entire number used
DMSB

15. Example: Divide 1256 by 3

16. 4 1 8
1256
-12 05
- 3 26
-24
Answer: 418 R2

17. Order of Operations PEMDAS (please excuse my dear aunt sally)
P for parenthesis
E for exponent
MD or DM for multiplication and division
AS or SA for addition and subtraction
Left to right
Left to right
Left to right
Left to right
Left to right

18. Examples of evaluating expressions
What is first?
9 + 5 – 4 x 2
What is next?
3x3 = 9
What is next?
14 - 8
What is next? 6

19. Left to right 5 + 12 2 – 4 + 3 x 6 5 + 6 – 4 + 18 11 – 4 + 18 7 + 1825
Left to right

20. Exponents
The exponent is a raised number that is an abbreviation for how many factors there are of the base number: base 5
The base is the number that is multiplied
5x5x5x5 is the expanded form
54 is exponent form
4 is the exponent

21. Exponential form and evaluation
15 x 15 x 15
7x7x7x7x7x7
2x2x2x2x2x2x2 33 25
18 =
70 =

22. Exponential form and evaluation
15 x 15 x 15
153
7x7x7x7x7x7 76
2x2x2x2x2x2x2 27 33
= 3 x 3 x 3
9 x 3 = 27 25
= 2x2x2x2x2
=4x4x2 = 32
18 = 1
70 = 1

23. Practice Problems Add 325 + 513 + 111 Subtract 1532 – 471 949
Round to nearest hundred 187,555
Add
Subtract 1532 – 471
Multiply 652 x 61
Divide 789 by 21
187,600
949
1061
39,772
37 R12