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Word problems with addition and subtraction, Stephanie's group, Clip 3 of 9: Problems 3 and 4, finding the larger number when the smaller number and the difference are given [video]. Retrieved from https://doi.org/doi:10.7282/T38913T2

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TitleWord problems with addition and subtraction, Stephanie's group, Clip 3 of 9: Problems 3 and 4, finding the larger number when the smaller number and the difference are given
PublisherNew Brunswick, NJ: Robert B. Davis Institute for Learning, 1989-03-21, c
Persistent URLhttps://doi.org/doi:10.7282/T38913T2
DescriptionIn the third of nine clips in a first grade classroom, four children: Stephanie, Gerardo, Sean and Aaron, are working first on Problem 3 and then on Problem 4 of a set of 6 word problems involving addition and subtraction. For the first of these, Stephanie and Gerardo discuss whether the number of Don's tennis balls would be one more or one less than Jim's, if Jim has one fewer tennis balls. The group agrees that there would be one more. For Problem 4, the children argue about whether Grandpa would have 3 or 6 chickens, if selling 3 chickens would result in his having the same number as Dad. As the children consider each problem, Researcher Alice Alston encourages them to explain their reasoning to each other.
Statement of Problem Three:
Jim has 3 tennis balls. Jim has 1 fewer tennis ball than Don. How many tennis balls does Don have?
Statement of Problem Four:
Dad has 3 chickens. If Grandpa sells 3 chickens, he will have as many as Dad. How many chickens does Grandpa have?
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-CLIP003