Transcript Parent Math Night

Parent Math
Night
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Tuesday, January 15, 2008
Chapel Hill Elementary
WELCOME
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Old Math vs. New Math
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$8.25 x 8 =
Ella earns $8.25 per
hour and 1 ½ times
this amount when
she works over 8
hours in a day. About
how much did Ella
earn if she worked 10
¾ hours last
Wednesday?
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What’s the difference?
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The focus of GPS math is for students to have
a deeper understanding of math concepts
and be able to apply newly learned
knowledge to real world situations.
Emphasis is on problem-solving, reasoning,
representation, connections, and
communication.
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A New Problem
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Abigail's cell phone company determines the price
she is charged each month by using the expression
59.99 + 0.45n when n represents the number of
day-time minutes over her plan allotment. If her
plan allotment is 450 day-time minutes per month,
use the expression to determine what the cell
phone company charged her if she talked 734 daytime minutes last month?
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Kindergarten
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• Understand concept of money by making
fair trades with coins
• Understand concept of time by experiencing
a daily schedule
• Understand concept of ones and tens
• Begin solving problems
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First Grade
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• Develop understanding of the measurement
of time
• Add or subtract smaller numbers with ease
• Understand addition and subtraction
number combinations using strategies such
as counting on, doubles, and making tens
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Second Grade
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• Understand place value to three digit
• Use correct decimal notation and symbols
• Solves three-digit addition and subtraction
problems with regrouping
• Use simple concepts of multiplication
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Third Grade
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• Develop skills of addition and subtraction
with decimals and use in problem solving
• Expand knowledge of multiplication and
use in problem solving
• Represent unknowns in mathematical
sentences using symbols
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Fourth Grade
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• Further develop meaning of decimals and
use them in computation and problem
solving
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Fifth Grade
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• Further understand multiplication of whole
numbers
• Understand and investigate algebraic
mathematical expressions
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How Parents Can Help
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• Be positive!
• Communicate with your child!
• Have high expectations!
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Math homework due
tomorrow. How can I help?
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• If you are unsure about math, don’t panic.
• If you are good at math, don’t take over.
• Questions to ask:
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– What is the problem you’re working on?
– What words or directions don’t you understand?
– What do you already know that can help you work
through the problem?
– Let’s try drawing a picture or making a diagram.
– Tell me where you’re stuck.
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Use ROPES
• Read
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– Did I read the problem thoroughly?
• Omit
– Cross out unneeded information.
• Plan
– What strategies can I use?
– What operation will I use?
• Execute
– Carry out your plan.
– Find the answer.
• Survey
– Does it make sense?
– Explain.
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Read
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Abigail's cell phone company determines the price
she is charged each month by using the expression
59.99 + 0.45n when n represents the number of
day-time minutes over her plan allotment. If her
plan allotment is 450 day-time minutes per month,
use the expression to determine what the cell
phone company charged her if she talked 734 daytime minutes last month?
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• Did I read the problem thoroughly?
Omit
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Abigail's cell phone company determines the price
she is charged each month by using the expression
59.99 + 0.45n when n represents the number of
day-time minutes over her plan allotment. If her
plan allotment is 450 day-time minutes per month,
use the expression to determine what the cell
phone company charged her if she talked 734 daytime minutes last month?
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• Cross out unneeded information.
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Plan
Abigail's cell phone company determines the price she is
each
month
using the expression 59.99 + 0.45n
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when n represents the number of day-time minutes over
her plan allotment. If her plan allotment is 450 day-time
minutes per month, use the expression to determine what
the cell phone company charged her if she talked 734 daytime minutes last month?
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• What strategies can I use?
• What operation will I use?
• I have to subtract to find out how many minutes Abigail
went over.
• I have to multiply to find out how much she will be
charged for the amount of minutes that she was over.
• I have to add the overage amount to the cost of her plan.
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Execute
Abigail's cell phone company determines the price she is
charged each month by using the expression 59.99 + 0.45n
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when n represents the number of day-time minutes over
her plan allotment. If her plan allotment is 450 day-time
minutes per month, use the expression to determine what
the cell phone company charged her if she talked 734 daytime minutes last month?
• Carry out the plan and find the answer.
Subtract
Multiply
Add
734
284
127.80
-450
x .45
+ 59.99
284
1420
$187.79
+ 1136
127.80
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Survey
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Abigail's
cell
phone
determines the price she is
charged each month by using the expression 59.99 + 0.45n
when n represents the number of day-time minutes over
her plan allotment. If her plan allotment is 450 day-time
minutes per month, use the expression to determine what
the cell phone company charged her if she talked 734 daytime minutes last month?
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Does it make sense? Explain.
I came up with $187.79.
If I go back and subtract 59.99 from 187.79, I get 127.80.
If I divide 127.80 by .45, I get 284.
If I add 284 to 450, I get 734.
REMEMBER
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• Be positive!
• Communicate with your child!
• Have high expectations!
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