Addition of Decimals
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( K-12math.info )

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None of the wiki's have an intuitive way to develop the concept of addition of decimals. The simplest and most natural approach would be in buying things. Buy any 2 items and add up their total cost.

  From Wikibook - "Line up decimal points, and then proceed to add each column and carry at the top. The decimal point in the answer should line up with all of the others...."
   Retrieved 2 March 2010

ADDITION OF DECIMALS
Series | Code | Information


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 K-8 (2002)

CNX Connexions OER Mathematics Grade 1-9 (2009)

Code:
USAGE CODE:
4  Definition or formal development
3 Term present
2 Synonym used
1 Enrichment
- Term not present
*- Material unavailable
Grade: _K___ _1___ _2___ _3___ _4___ _5___ _6___ _7___ _8___ _9___ _10__ _11__
Age: 5 6 7 8 9 10 11 12 13 14 15 16
  1-1972 - - - - 4-358 4-258 4-236 4-202 4-075 - - -
  2-1972 - - - - - 4-272 4-048 4-232 4-249 - - -
  3-1978 - - - - 4-282 3-216 3-134 3-130 4-088 - - -
  4-1981 - - - - 3-300 4-178 3-082 3-080 4-052 - - -
  5-1985 - - - 4-332 4-350 4-088 4-064 4-040 4-038 - - -
  6-1985 - - - - 3-322 4-260 4-164 4-092 4-028 - - -
  7-1985 - - - - 4-294 4-304 4-140 4-098 4-102 - - -
  8-1985 - - - 4-308 4-344 4-294 4-218 4-094 4-040 - - -
  9-1985 - - - 3-334 3-330 3-278 4-128 4-046 4-044 - - -
 10-1986 - - - - 4-288 4-134 4-110 4-104 4-074 - - -
 11-2002 - - - 4-520 4-388 4-058 4-031 - - - - -
 12-2002 - - - 3-600 4-598 4-018 3-010 - - *- *- *-
 CNX
  2009		 *- - - - - 4 3 4 - - *- *-

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), 2010 Jim Kelly - All Rights Reserved.