Math in the Elementary Classroom
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Transcript of Math in the Elementary Classroom
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Math in the Elementary ClassroomBy: Jessica Theis
Picture: http://www.dcptsa.com/math-superstars/&docid=7vFr4rhi6u7WnM&w=600&h=544&ei=oHuTTu7uMueesQLr5L29Bg&zoom=1&iact=rc&dur=301&page=1&tbnh=115&tbnw=106&start=0&ndsp=17&ved=1t:429,r:13,s:0&tx=41&ty=62
+Main Operations of Math
Addition
Subtraction
Multiplication
Division
Picture: http://www.martincwiner.com/helpful-math-typesetting-tool-prime-twin-counting-function-example/&docid=WC14HzDEBHQVgM&w=471&h=319&ei=oHuTTu7uMueesQLr5L29Bg&zoom=1&iact=rc&dur=354&page=1&tbnh=104&tbnw=154&start=0&ndsp=17&ved=1t:429,r:10,s:0&tx=86&ty=55
+Addition
Numbers or quantities are combined to form a new number or quantity
Sign indicating addition looks like this: +
Words indicating addition: sum, total, plus, increase, gain, more
Reference: http://www.cliffsnotes.com/study_guide/Keywords-for-Mathematical-Operations.topicArticleId-8823,articleId-8818.html
Picture: http://bookbuilder.cast.org/view_print.php%3Fbook%3D20882&docid=3-mE-ncQyLrluM&w=491&h=490&ei=I32TTp6IHvKKsALSxpi-Bg&zoom=1&iact=hc&vpx=267&vpy=205&dur=66&hovh=224&hovw=225&tx=121&ty=119&sqi=2&page=5&tbnh=118&tbnw=118&ndsp=18&ved=1t:429,r:7,s:81
+Basic Rules of Addition
a+b=b+a 2+3=3+2
a+0=a 8+0=8
2+1=3 +1=the number following it
7+2=9 +2=skip counting going up
Reference: http://www.teach-nology.com/forum/showthread.php?t=2951
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+Examples of Addition
Examples:
2+1=3
9+0=9
6+2=8
+Subtraction
A number or quantity is taken away from the group
Sign indicating subtraction: -
Words indicating subtraction: difference, minus, decrease, loss, less, fewer, take away
Reference: http://www.cliffsnotes.com/study_guide/Keywords-for-Mathematical-Operations.topicArticleId-8823,articleId-8818.html
Picture: http://www.dailyclipart.net/clipart/category/math-clip-art/&docid=m30XOhvYUErG1M&w=340&h=250&ei=U36TTtCTEK-lsQLYxcS-Bg&zoom=1&iact=rc&dur=381&sqi=2&page=3&tbnh=104&tbnw=142&ndsp=18&ved=1t:429,r:10,s:35&tx=103&ty=43
+Basic Rules of Subtraction
a-0=a
a-a=0
6-1=5 -1=the number preceding it
7-2=5 -2=skip counting going down
Picture: http://www.ehow.com/about_5448285_rules-subtracting-negative-number-line.html&docid=LLSIzua1xiSF6M&w=225&h=220&ei=eX-TTuTID-TgsQKozPjEBg&zoom=1&iact=rc&dur=534&page=1&tbnh=124&tbnw=180&start=0&ndsp=16&ved=1t:429,r:2,s:0&tx=85&ty=62
+Examples of Subtraction
Examples:
6-3=?
10-0=?
5-2=?
+Multiplication
Describes scaling one number or quantity by another number or quantity
Sign indicating multiplication: x or *
Words indicating multiplication: multiply, product, times
Reference: http://www.cliffsnotes.com/study_guide/Keywords-for-Mathematical-Operations.topicArticleId-8823,articleId-8818.html
Picture: http://www.ehow.com/info_7978422_grade-5-multiplication-games.html&docid=ZlfFVY1tUYJ-7M&w=225&h=220&ei=pn-TToOZPMbLsQKVkNCsBg&zoom=1&iact=hc&vpx=775&vpy=310&dur=1912&hovh=176&hovw=180&tx=92&ty=88&sqi=2&page=7&tbnh=114&tbnw=116&ndsp=18&ved=1t:429,r:11,s:106
+Basic Rules of Multiplication
a x b = b x a
a x 10=a0
a*1=a
*2=double the number
x 5=counting by 5’s
*9=hand trick
Reference: http://www.dadsworksheets.com/v1/Strategies/eight_rules_of_multiplication.html
Picture: http://www.study-skills-for-all-ages.com/image-files/multiplication_flashcard_color.gif
+Examples of Multiplication:
7*1=7
4 x 2=8
1*10=10
+Division
A number or quantity is broken into a certain number of groups creating a new number
Sign indicating division looks like this: / or ÷
Words indication division: quotient, divide
Reference: http://www.cliffsnotes.com/study_guide/Keywords-for-Mathematical-Operations.topicArticleId-8823,articleId-8818.html
Picture: http://www.coolmath4kids.com/long-division/long-division-lesson-3.html&docid=JpY5JBuTRcpA6M&w=345&h=286&ei=W4STTqicMeWMsAK73NigBg&zoom=1&iact=hc&vpx=211&vpy=168&dur=4157&hovh=204&hovw=247&tx=128&ty=90&page=1&tbnh=110&tbnw=133&start=0&ndsp=18&ved=1t:429,r:1,s:0
+Basic Rules of Division
0/a=0
a÷1=a
Divisible by 2: last digit ends in 0,2,4,6,or 8
Divisible by 3: sum of digits are divisible by 3
Divisible by 4: last 2 digits are divisible by 4
Divisible by 5: last digit is 0 or 5
Reference: http://www.basic-mathematics.com/divisibility-rules.html
Picture: http://innerknockings.blogspot.com/2010/03/division.html&docid=4kJJ_vVjONVnCM&w=300&h=300&ei=W4STTqicMeWMsAK73NigBg&zoom=1&iact=hc&vpx=86&vpy=226&dur=565&hovh=225&hovw=225&tx=129&ty=127&page=3&tbnh=116&tbnw=116&start=36&ndsp=17&ved=1t:429,r:0,s:36
+Basic Rules of Division Part 2
Divisible by 6: has to be divisible by 2 AND 3
Divisible by 7: Take away last digit and double it and subract it from remaining digits. If that number is divisble by 7, the the original number is divisible by 7.
Divisible by 8: last three digits are divisible by 8
Divisible by 9: sum of digits is divisible by 9
Divisible by 10: last digit is 0
References http://www.basic-mathematics.com/divisibility-rules.html
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+Examples of Division
Examples:
6/3=2
4÷1=4
0/7=0