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Chapter 6 Math Test 2. txt
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Why do teachers teach concept development of addition and subtraction?
to teach what it means and when it is appropriate
Enactive Mode = Concept Development
1. problem needs to be solved
2. manipulatives to use
3. allow them to explore
4. ask for questions to check for understanding
Definition of Learning Basic Facts of Addition
sum of two whole numbers less than ten (sum does not matter)
Order of Teaching Basic Facts
1. sums less than 10
2. sums greater than 10
3. sums equal to 10
Same Sum Fact Family
1. all basic fact with same number answer
2. all of the different ways you can show the number
3. each time you find a different way, write down the number sentence
Transitivity of Equality
1. discover process when using same sum fact family arrangement
2. 5 + 1 = 4 + 2
Basic Fact of Addition Information
1. 100 basic facts of addition
2. children only memorize 45
3. vertical format most helpful for memorization
4. commutative property responsible for reducing
Mental Math Strategies for Addition
1. Count On or Count Up
2. Near Doubles
3. Make 10
4. Hidden Number
Count On or Count Up Mental Math Strategy
--must have addend of either 1 or 2
--child says larger addend then counts up
Near Doubles Mental Math Strategy
--two addends are consecutive numbers on the number line
--children must memorize double facts first
--use smaller number, then add one or use bigger number, then subtract one
Make 10 Mental Math Strategy
--sum is greater than 10
Hidden Number Mental Math Strategy
--use this strategy when there is one whole number in between two addends
--depend upon memorization of doubles facts
Related Number Fact Families for Subtraction
1. three related numbers, two numbers are the addends and one of the numbers is the sum
2. can write two addition and two subtraction sentences
3. using just the terms, I can name all the fact families to relate to the commutative property
Author
emilybrooke082690
ID
77107
Card Set
Chapter 6 Math Test 2. txt
Description
Math Test Two Chapter Six
Updated
2011-04-04T03:36:22Z
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