Do Now 11/17/10

Take out HW from last night.


Copy HW in your planner.



Punchline worksheet #40
Text page 105, #24-34 evens, #38-44 evens
Quiz sections 2.6 & 2.7 Friday
In your journal, solve the following problems. Explain how
the first problem is different from the rest.
83
 8 .2  3 .5
5
 4 .7
6.1  18.7
 12.6
 6.82(11.7)
79 .794
8.16  3.4
2 .4
Homework
Punchline worksheet #40











L) -12
A) -4
S) 5
E) -54
P) 100
T) 36
C) -7
I) -120
U) -150
O) -50
S) 240











H)
A)
S)
D)
Y)
F)
O)
B)
L)
R)
S)
-4.5
-84
90
-200
-17
-10
64
-20
180
2.5 lb
144
“Why Did the Outfielder
Join the Orchestra?
So He Could Play First
Bass!
Objective
 SWBAT
solve equations using decimals
Equationmathematical
sentence
with an equal sign
Like a scale,
both sides
must be balanced
Section 2.7 “Equations with
Decimals”
x + 7.2 = 10.5
Left side
‘x’ has to be 3.3 in
order to make the
equation balanced.
Like a scale, the left
side and right side must
be the same in order to
be balanced!
Right side
Solving Addition Equations…
Isolate the variable! Get ‘m’ by itself.
To get the ‘m’
by itself get rid of
“adding 4.7”
m + 4.7 = -18.2
– 4.7
-4.7
Do the opposite.
“Subtract 4.7”
Whatever you do to
one side of the equation
you must do the other side.
m = -22.9
-18.2 – 4.7
-18.2 + (-4.7) “opp-opp”
-22.9
Solving Subtraction Equations…
Isolate the variable! Get ‘y’ by itself.
To get the ‘y’
by itself get rid of
“subtracting 6.91”
Do the opposite.
“Add 6.91”
-2.26 = y – 6.91
+6.91
+6.91
4.65 = y
Whatever you do to
one side of the equation
you must do the other side.
Solving a Multiplication Equation
-0.6y = -5.1
-0.6
-0.6
y = 8.5
“Undo”
multiplication
by dividing
both sides of the
equation
Solving a Division Equation
-8· j = 1.75 · -8
-8
j = -14
“Undo”
division by
multiplying
both
sides of the
equation
Guided Practice
Notetaking Guide page 35,
Checkpoints #1-9
1) -8.7
2) 10.58
3) 16.52
4) -2.05
5) x = 3.8
6) y= -4.7
7) m = -1.9
8) x = -7.2
9) y = 26.04
WAR!!!
Using your boards solve the
equations as fast as possible. If your
number is called … you are at WAR!!
Homework
Text page 105, #24-34 evens, #40-44 evens