Math Basics

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Math Basics

• AF 1.3

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Objective - To understand some BASIC rules of
mathematics Objective - To reason with diagrams.
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BIG RULES of MATH

• ? The SIGN goes with the TERM!
• ? No Double Signs!

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The SIGN goes with the TERM! Think of EACH TERM
individually. Example 5 3 - 7 This should
NOT be thought of as5 PLUS 3 MINUS 7 But rather
as aPOSITIVE 5, a POSITIVE 3, and a NEGATIVE 7
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Remove Double Signs
To remove double signs, use the Alien Face. The
Alien Face is also used when multiplying or
dividing numbers with different signs.
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Adding Subtracting Integers

• Example 15 ( 22) (13) 4
• 15 22 13 4
• Step 1 Get rid of Double signs!
• Step 2 Circle each term.
• Remember The sign goes with the term.
• Step 3 Put each term in the correct column.
• Step 4 Add each column.
• Step 5 Decide winning team
• Step 6 Determine the spread.
• (big number small number)

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15
22
13
4
28
26
Winning team Spread 28 26
2 Answer 2
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Adding Subtracting Integers

• Example 14 27 5 9
• Step 1 Circle each term.
• Remember The sign goes with the term.
• Step 2 Put each term in the correct column.
• Step 3 Add each column.
• Step 4 Decide winning team
• Step 5 Determine the spread.
• (big number small number)

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14
27
5
9
19
36
Winning team Spread 36 19
17 Answer 17
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A Tie?

• Example 13 12 7 8
• Step 1 Circle each term.
• Remember The sign goes with the term.
• Step 2 Put each term in the correct column.
• Step 3 Add each column.
• Step 4 Decide winning team
• Step 5 Determine the spread.
• (big number small number)
• A tie means the answer is zero!

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13
12
7
8
20
20
Winning team NO WINNER Spread 20 20
0 Answer 0
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Try These

• 11 2 ( 5) 4
• 4 ( 8) 9 5
• 3 (16) (7) (13)

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Word Problems OH NO!
The temperature at 4 pm Tuesday was 14
Fahrenheit. By 6 am Wednesday, the temperature
had dropped 21. What was the temperature?
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Word Problems OH NO!
The temperature at 5 am was -5F.At 3 pm the
temperature raised 12.What is the temperature
at 3pm?
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Word Problems OH NO!
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Order of OperationsPEMDAS
PARENTHESES
EXPONENTS
MULTIPLICATION or DIVISION(left to right)
ADDITION or SUBTRACTION (left to right)
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Try these!
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Round each number to the place indicated
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Order of Operations
PARENTHESES
EXPONENTS
MULTIPLICATION or DIVISION(left to right)
ADDITION or SUBTRACTION (left to right)
Place Value Chart