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