ADDITION OF FRACTIONS - ADICION (FRACCION) - ADDITION (FRACTION)
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( K-12math.info )


  ADICION (FRACCION) (Espa˝ol)

  ADDITION (FRACTION) (Franšais)

  From Wikieducator...a teaching approaches for addition of fractions

  From Wikipedia " ... Imagine a pocket containing two quarters, and another pocket containing three quarters; in total, there are five quarters....."

  From Wikibook reference 1 "Before we go into fractions, let's think about what addition is. Answer these questions:
*What is 1 bird + 5 birds?
*What is 3 elephants + 9 elephants?
*What is 6 birds + 2 elephants?
Hopefully you could answer the first two, but you might have had trouble with the third. Why? Because we can't add up two different things! ......"

  From Wikibook reference 2 [a method for additing fractions]

  From Wikiversity"Fractions that have the same or "Common" denominator are called "Like" fractions. 1/3, 2/3 (one-third, two-thirds)
To add Like fractions together such as these: 1/3 + 2/3 = ? (one-third plus two-thirds equals what?)
1. Add the numerators (the top numbers): 1 + 2 = 3 (one plus two equals three)
2. Use the common denominator (the bottom numbers): /3
All together it looks like this: 1/3 + 2/3 = 3/3 (one-third plus two-thirds equals three-thirds)..... "

ADDITION OF FRACTIONS
Series | Code | Information

Student Textbook Series:
Grades: K-11 (ages: 5-16)

1. Harcourt Brace Jovanovich(1972)
2. D.C. Heath (1972)
3. Laidlaw (1978)
4. Houghton Mifflin(1981)
5. Addison-Wesley(1985)
6. Harper and Row(1985)
7. Holt, Rinehart and Winston(1985)
8. Harcourt Brace Jovanovich(1985)
9. Houghton Mifflin(1985)
10. Scott, Foresman(1986)
11. Houghton Mifflin(2002)
12. McGraw-Hill/Glencoe (2002)

13. OpenSTAX/CNX/Siyavula Grades 1-9 (2009)
--- Grades 10 and 11 (2011)(OER)*
South Africa edition

14. CK-12 Mathematics 1-5 (2015)
--- (OER but not textbooks)
--- CK-12 Mathematics 6-11 (2012) (OER)*

15. Bangladesh Mathematics 1-7 (2013)
--- (OA)** (Online no longer available)

16. McGraw-Hill/Glencoe (2013/2014)

17. Math in Focus - Singapore Math
Dist. by Houghton Mifflin Harcourt K-8 (2013/2015)

18. AAAKnow (formally AAAMath) K-8 (2014)
--- (Copyrighted and not textbooks)

19. Houghton Mifflin K-8 (2015)

20. Khan Academy K-8 (2015)
--- (OER not textbooks) --


Code:
USAGE CODE:

4 Term used (formally developed)
3 Term used (to support formal development)
2 Synonym of term used
1 Term used (enrichment)
- Term not present
--- Textbook not available




(OER)* This is an Open Educational Resource.
(OA)** Open Access but with standard copyright.

Grade: _K___ _1___ _2___ _3___ _4___ _5___ _6___ _7___ _8___ _9___ _10__ _11__
Average Age: 5 6 7 8 9 10 11 12 13 14 15 16
  1-1972 HBJ - - - - 4-148 4-152 4-142 4-131 4-051 - - -
  2-1972 Heath - - - - 4-138 4-216 3-131 - - - - -
  3-1978 Laidlaw - - - - 4-274 4-160 4-202 4-212 - - - -
  4-1981 HM - - - - 3-288 3-190 3-194 4-248 - - - -
  5-1985 Addison - - - - 4-246 4-232 4-204 4-206 4-092 - - -
  6-1985 Harper - - - - 4-286 4-214 4-226 4-219 4-118 - - -
  7-1985 Holt - - - - 4-272 4-222 4-209 4-162 4-168 - - -
  8-1985 HBJ - - - - 4-266 4-192 4-160 4-172 4-092 - - -
  9-1985 HM - - - - 4-168 4-206 4-238 4-168 4-098 - - -
 10-1986 Scott - - - - 4-316 4-272 4-246 4-168 4-118 - - -
 11-2002 HM - - - 3-504 4-350 4-330 4-111 4-269 - - - -
 12-2002 McGraw - - - 3-552 4-516 4-252 3-212 4-244 4-082 - - -
 13-2009/10 OpenSTAX
CNX/Siyavula (OER)
South Africa edition
--- - - 3 - 3 4 3 4 - - -
 14 - 2012/2015 CK12.org (OER)

--- - 2 - 1 1 4 4 - - - -
 15-2013 Bangladesh (OA) --- - - 4-075 4-073 4-058 4-019 - --- --- --- ---
 16-2013 McGraw - - - - 4-567 3-619 - 3-284 - - - -
 17-2013/15 Singapore Math
U.S. edition
- - 3-B092 - 4-A245 - - - - --- --- ---
 18-2014 AAAKnow
(update to AAAMath)
- - 1 1 1 1 1 1 1 --- --- ---
 19-2015 HM - - - - 3-287 3-253 - - - --- --- ---
 20-2015 Khan Academy - - - - 1 1 - 1 - --- --- ---

usage code - page number
(for OER materials, click on the usage code under the desired grade level.)



©1972 (paper), 1985 (APPLE II/PC), 2005(www), 2016 Jim Kelly - All Rights Reserved.