addition set model of addition measurement model of addition rods
Post on 20-Dec-2015
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Addition
Set Model of Addition
Measurement Model of Addition
Rods
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Subtraction Models
Take Away (sets)
Missing Addend
Comparison (how many more)
Number line
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Multiplication
• Multiplication as repeated addition
• Sets
• Number Line
• Rectangular Area
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Division of Whole Numbers• Repeated Subtraction
• Partition
• Missing Factor
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How many groups?
• A ÷ B• 8 ÷ 2• 8 objects are divided into groups with 2 objects in
each group.
• “How many Groups?”
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Adding & Subtracting in Other Bases
143 five
+234 five
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Subtract
231 five 434 five
144 five 243 five
32 five 141 five
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Convert to Base 10 notation
413 five 2004 five
100 five 214 seven
213 six 415 six
2E4twelve 1TEtwelve
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Subtract
231 five 434 five
144 five 243 five
32 five 141 five
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Test for divisibility
A number N is divisible by• 2 if the last digit is an even digit(0,2,4,6,8).• 3 if the sum of the digits is divisible by 3.• 5 if the last digit is a 0 or 5.• 6 if it is divisible by 2 & 3.• 9if the sum of the digits is divisible by 9.• 10 if the last digit is 0.
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Tell which of the following are divisible by 2,3,5,6,9,or10
• 43,826• 111,111• 26,785• 5,280
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• Finding GCF & LCM by using Prime Power Representation.
• Euclidean algorithm.• Venn Diagrams
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Integer Representation
• Colored countersBlack = +Red = -Game keeping score.• Mail Time Representation• Number Line Representation
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Addition of Integers
• Represent sum of integers using colored counter diagrams.
• Mail Time Stories ( pg 297)• Number Line
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Subtraction of Integers
• Using colored Counters.• 7- 4• BBBBBBB• -8 - -3• RRRRRRRR
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Draw Diagrams for each of the following:
• 7 – 4• -3 - -2• 8 - -5• 7 – 10• -7 - 3
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Mail Time Stories
• Pg 317• Multiplication• Division•
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Order of Fractions
• a/b is less than c/d if and only if ad < bc.
• Mickey Mouse.• Fraction strips Pg 355• Diagrams.• Activity 5• Comparing fraction by Reasoning
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Adding & Subtracting Fractions with different denominators.
Pattern Block Worksheet.Activity 7 wkst.
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X =
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Division of Fractions
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• What is the whole• Using pattern blocks• Diagram• Word Problems for x & /• Percents – diagrams• Ratios & Proportions.