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Word problems with addition and subtraction, Stephanie's group, Clip 7 of 9: Determining solutions for problems 5 and 6 [video]. Retrieved from https://doi.org/doi:10.7282/T3R78C4Q

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TitleWord problems with addition and subtraction, Stephanie's group, Clip 7 of 9: Determining solutions for problems 5 and 6
PublisherNew Brunswick, NJ: Robert B. Davis Institute for Learning, 1989-03-21, c
Persistent URLhttps://doi.org/doi:10.7282/T3R78C4Q
DescriptionIn the seventh of nine clips in a first grade classroom, four children: Stephanie, Gerardo, Sean and Aaron, revisit and reconsider their solution to the final problem of a set of six word problems involving addition and subtraction. Refer to clip 4 of the series for their first solution to the problem. In clip 6 of the series, the children revisited Problem 5 and recorded 2 as their answer. although they hesitated because 2 was also their answer for Problem 6. When Researcher Alice Alston encourages the children to find a way to show her how they determined their answer.for Problem 6 , Stephanie builds two towers with available Unifix cubes, one with six cubes and the other with four cubes. She explains that the difference of two is the answer. They look back at problem 5 and note that the difference between five cubes and three cubes is also two and leave that number as the answer for each of the problems.
Statement of Problem 5:
Eric washed 5 dishes. Eric washed 3 more dishes than Catherine. How many dishes did Catherine wash?
Statement of Problem 6:
The kangaroo jumps 6 times. If the rabbit jumps 4 more times, it will have jumped as many times as the kangaroo. How many times did the rabbit jump?
Math ToolUnifix cubes, Colored stones
Math StrandArithmetic
Math ProblemWord problems with addition and subtraction
NCTM Grade RangePreK-2
NCTM Content StandardNumber and operations
NCTM Process StandardProblem solving, Reasoning and proof, Communication, Connections, Representation
Forms of Reasoning, Strategies and HeuristicsDirect reasoning, Guessing and checking
Grade Level1
Student ParticipantsStephanie (student), Sean (student), Gerardo (student), Aaron (student)
MediatorsAlston, Alice S. (Researcher), Marinaro, Angela (Teacher)
CorporateHarding Elementary School (Kenilworth, N.J.)
SettingClassroom
Student GenderMixed
Student EthnicityWhite
Camera ViewsStudent view
RightsThe video is protected by copyright. It is available for reviewing and use within the Video Mosaic Collaborative (VMC) portal. Please contact the Robert B. Davis Institute for Learning (RBDIL) for further information about the use of this video.
Local IdentifierB30-ARTH-WRDP-CLIP007