Concepts 1.1
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Transcript Concepts 1.1
Bell Work
8/22/14
Pick 4 expressions and evaluate those expressions.
1.
85
4.
7 13
7.
8 2.
5
13
7
8 9
8
9
5.
8.
15 4
12 8
15
4
12
8
20 12
3.
14 9
6.
18 25
18
25
9.
20
12
14
9
13 35
35
13
Yesterday’s Homework
1. Any questions?
2. Please pass your homework to the front.
• Make sure the correct heading is on your paper.
• Is your NAME on your paper?
• Make sure the homework is 100% complete.
• Incomplete work will NOT be accepted.
What Do Notes Look Like?
• Heading
• Date
• Section # and Title
• Notes
• You do not have to copy
the text in blue!
•Homework
Heading
3/28/2016
1.2B Adding and Subtracting
Real Numbers (subtract)
TSWBAT: subtract real numbers.
Students understand and use such operations as
taking the opposite, finding the reciprocal, taking
a root, and raising to a fractional power. They
understand and use the rules of exponents.
Notes
• Rules for Subtraction
- To subtract b from a, add the opposite of b to a.
a b a (b)
- Leave, change, change.
• When subtracting two numbers, leave the first
number, change the subtraction sign to addition,
and change the second number to its opposite.
Leave!
Change!
Change!
a b
a b
Notes
Evaluate the expression.
Ex.
Leave!
12 4
Change!
4
12
12 Change!
8
4
8
Now you try.
Ex.
8 13
8 13
13
5
8
5
Leave!
Change!
Change!
Ex.
Leave!
10 3
Change!
10 3
Change!
10
13
3
13
Ex.
Leave!
6 4
Change!
4
6
6 Change!
2
4
2
Notes
Evaluate the expression.
Ex.
Ex.
92
9 2
7
9
2
7
4 10
4 10
6
Ex.
10
4
6
6 8
6 8
14
6
8
14
Now you try.
Ex.
20
7 20
7
7 20
13
13
Ex.
12 29 29
12
12 29
17
17
Ex.
5
5 31
31
5 31
36
36
Notes
Evaluate the expression.
Ex.
7
5
723
2 3
3
7 2
5
8
53
8
Ex.
9 6
39 2
3 2
2
3 9
6 8
6 2
8
Now you try.
Ex.
3 1 9
3 1 9
4 9
5
Ex.
3
9
1 4
4
5
8 7
847
4 4
8 4 7
4 3
4 7
3
Notes
Evaluate the expression.
9
Ex.
6
6 9
3
7 7
6 9
3
7 7
7
Ex.
4.3 7.5
4.3 7.5
7.5
4.3
3.2
3.2
Now you try.
2
5
2 5
7
3 3
2 5
7
3 3
3
Ex.
Ex.
5.7 1.2
5.7 1.2
4.5
5.7
1.2
4.5
Summary
Subtracting real numbers is just another way of
Change
adding. All you have to do is “Leave, _______,
Change.” This will make the subtraction problem an
addition problem. Now just follow the rules of
________
addition.
Today’s Homework
Rules for Homework
1. Pencil ONLY.
2. Must attempt EVERY problem.
3. Always check your answers.
Class Work
Evaluate the expression.
1.
2 10
2.
23 11
3.
24 46
4.
6 3
5.
10 4
6.
16 11
7.
9 12
8.
1 12
9.
8 22
10.
4 14
11.
13 2
12.
13 31
13.
21 30
14.
25 11
15.
41 17
17.
7 4
2 2
18.
3.4 2.5
16.
725
Ticket Out the Door
Complete the Ticket Out the Door without talking!!!!!
Talking = time after the bell!
Put your NAME on the paper.
When finished, turn your paper face DOWN.
Evaluate the expression.
10 17