Download File

Week 6 : 3.1 – 3.2
Wednesday
Day 4 of 3.2
Bell Ringer

Write an equation to represent:
I need to spend exactly ten dollars at
the grocery store buying apples and
bananas. Apples are two dollars each,
bananas are one dollar each.
Homework

Questions from Homework??
3.2 Exploring Word Problems
Using Elimination




Letter activity
Walthall
Take out a sheet of paper.
W could represent…
Write your name at the
top
Watermelons
Circle the first letter
Weights
Write 4 things that your
Weeks
letter could logically
Workbooks
represent / stand for.
3.2 Exploring Word Problems
Using Elimination



5
…Letter activity
5 could represent…
SAME sheet of paper.
Write NUMBER of the
5 Watermelons
MONTH you were born
5 weights
below your list.
5 weeks
Write 4 things that your
5 workbooks
number could logically
represent / stand for WITH
your previous words.
3.2 Exploring Word Problems
Using Elimination


…Letter activity
SAME sheet of paper.
Write these 4 phrases
using just your number
and your letter.
could be shortened
to …
5w
5w
5w
5w
3.2 Exploring Word Problems
Using Elimination


Find a partner with a
DIFEERENT LETTER
than you. (Different
first initial)
Leave a space, then
write your partners
number and letter
next to your number
and letter.
5w
5w
5w
5w
6m
6m
6m
6m
3.2 Exploring Word Problems
Using Elimination



Fill in the space with
either an addition or
subtraction symbol.
After your partners
number and letter,
write = and fill in a
number larger than
12.
Use different
numbers each time!
5w + 6m = 15
5w + 6m = 25
3.2 Exploring Word Problems
Using Elimination


Write a WORD
PROBLEM to represent
you and your partners
number and symbol
being added or
subtracted to equal that
value.
Do this 2 times, to
make 2 DIFFERENT
equations.
5w + 6m = 15
Five watermelons
plus six mangos
costs fifteen dollars.
5w + 6m = 25
I have twenty five
dollars to spend on
five dollars per
whiteboard plus six
dollars per marker.
3.2 Exploring Word Problems
Using Elimination




TRADE PAPERS with
your partner.
Now write down ONE of
your WORD PROBLEMS
for your partner on
his/her paper.
TRADE BACK
Write an EQUATION for
his/her word problem.
Five watermelons plus
six mangos costs
fifteen dollars.
5w + 6m = 15
I have twenty five
dollars to spend on
five dollars per
whiteboard plus six
dollars per marker.
5w + 6m = 25
3.2 Exploring Word Problems
using Elimination


Congratulations! You just explored how
to write word problems from equations,
and how to write equations from word
problems.
Now let’s practice writing two at a time.
(Making a ______ of _____)
3.2 Explain

Pg 22 workbook resources Word
Problem Practice #1,2,4
3.2 Explain
y=27-3x
y=17-x
Multiply second by -1
y=27-3x
-y=-17+x +
0y=10-2x
2x=10  x=5
3.2 Explain
y=2x+3
3y=6x+6
Multiply first by -3
-3y=-6x-9
3y=6x+6 +
0y=0x-3
0=-3 !? No solution
3.2 Explain
2x+1y=11
6x+5y=38
Multiply first by -3
-6x-3y=-33
6x+5y=38 +
0x+2y=5
2y=5  y=5/2= $2.50
3.2 Elaboration
3.2 Elaboration
Homework



Worksheet
SHOW ALL WORK for credit
Practice Test


First HALF due Thursday (tomorrow)
Second HALF due day Friday (Test day)