This document provides an overview of the main mathematical operations taught in elementary classrooms - addition, subtraction, multiplication, and division. For each operation, it defines the key terms, symbols, rules, and provides examples. The document aims to explain the basic concepts and rules of each operation to help teach math in elementary classrooms.

1. Math in the Elementary Classroom By: 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

2. 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

3. 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

4. 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 Picture: http://alexisglobaloria1022.blogspot.com/&docid=8wuJYm9cTZ5ZqM&w=300&h=300&ei=In2TTvC8IJOFsAKPxPHXBg&zoom=1&iact=rc&dur=283&sqi=2&page=1&tbnh=110&tbnw=136&start=0&ndsp=21&ved=1t:429,r:10,s:0&tx=50&ty=68

5. Examples of Addition Examples: 2+1=3 9+0=9 6+2=8

6. 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

7. 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

8. Examples of Subtraction Examples: 6-3=? 10-0=? 5-2=?

9. 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

10. 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

11. Examples of Multiplication: 7*1=7 4 x 2=8 1*10=10

12. 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

13. 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

14. 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 Picture: http://www.superstock.com/stock-photos-images/1538R-2017&docid=u7H96Q77c2A6wM&w=323&h=350&ei=vouTTqWjOIKIsQLP2vDKBg&zoom=1&iact=hc&vpx=240&vpy=113&dur=350&hovh=234&hovw=216&tx=113&ty=104&page=1&tbnh=134&tbnw=124&start=0&ndsp=17&ved=1t:429,r:12,s:0

15. Examples of Division Examples: 6/3=2 4÷1=4 0/7=0