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# Math in the Elementary Classroom

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### Math in the Elementary Classroom

1. 1. Math in the Elementary Classroom<br />By: Jessica Theis<br />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<br />
2. 2. Main Operations of Math<br />Addition<br />Subtraction<br />Multiplication<br />Division<br />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<br />
3. 3. Addition<br />Numbers or quantities are combined to form a new number or quantity<br />Sign indicating addition looks like this: +<br />Words indicating addition: sum, total, plus, increase, gain, more<br />Reference: http://www.cliffsnotes.com/study_guide/Keywords-for-Mathematical-Operations.topicArticleId-8823,articleId-8818.html<br />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<br />
4. 4. Basic Rules of Addition<br />a+b=b+a<br />2+3=3+2<br />a+0=a<br />8+0=8<br />2+1=3<br />+1=the number following it<br />7+2=9<br />+2=skip counting going up<br />Reference: http://www.teach-nology.com/forum/showthread.php?t=2951<br />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<br />
5. 5. Examples of Addition<br />Examples: <br />2+1=3<br />9+0=9<br />6+2=8<br />
6. 6. Subtraction<br />A number or quantity is taken away from the group<br />Sign indicating subtraction: -<br />Words indicating subtraction: difference, minus, decrease, loss, less, fewer, take away<br />Reference: http://www.cliffsnotes.com/study_guide/Keywords-for-Mathematical-Operations.topicArticleId-8823,articleId-8818.html<br />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<br />
7. 7. Basic Rules of Subtraction<br />a-0=a<br />a-a=0<br />6-1=5<br />-1=the number preceding it<br />7-2=5<br />-2=skip counting going down<br />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<br />
8. 8. Examples of Subtraction<br />Examples:<br />6-3=?<br />10-0=?<br />5-2=?<br />
9. 9. Multiplication<br />Describes scaling one number or quantity by another number or quantity<br />Sign indicating multiplication: x or *<br />Words indicating multiplication: multiply, product, times<br />Reference: http://www.cliffsnotes.com/study_guide/Keywords-for-Mathematical-Operations.topicArticleId-8823,articleId-8818.html<br />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<br />
10. 10. Basic Rules of Multiplication<br />a x b = b x a<br />a x 10=a0<br />a*1=a<br />*2=double the number<br />x 5=counting by 5’s<br />*9=hand trick<br />Reference: http://www.dadsworksheets.com/v1/Strategies/eight_rules_of_multiplication.html<br />Picture: http://www.study-skills-for-all-ages.com/image-files/multiplication_flashcard_color.gif<br />
11. 11. Examples of Multiplication:<br />7*1=7<br />4 x 2=8<br />1*10=10<br />
12. 12. Division<br />A number or quantity is broken into a certain number of groups creating a new number<br />Sign indicating division looks like this: / or ÷<br />Words indication division: quotient, divide<br />Reference: http://www.cliffsnotes.com/study_guide/Keywords-for-Mathematical-Operations.topicArticleId-8823,articleId-8818.html<br />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<br />
13. 13. Basic Rules of Division<br />0/a=0<br />a÷1=a<br />Divisible by 2:last digit ends in 0,2,4,6,or 8<br />Divisible by 3: sum of digits are divisible by 3 <br />Divisible by 4: last 2 digits are divisible by 4<br />Divisible by 5: last digit is 0 or 5<br />Reference: http://www.basic-mathematics.com/divisibility-rules.html<br />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<br />
14. 14. Basic Rules of Division Part 2<br />Divisible by 6: has to be divisible by 2 AND 3<br />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.<br />Divisible by 8:last three digits are divisible by 8<br />Divisible by 9: sum of digits is divisible by 9<br />Divisible by 10:last digit is 0 <br />References http://www.basic-mathematics.com/divisibility-rules.html<br />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<br />
15. 15. Examples of Division<br />Examples:<br />6/3=2<br />4÷1=4<br />0/7=0<br />