Number Talk in 3rd Grade

FCS shilohpoint
25 Mar 201410:34

Summary

TLDRThe video script captures a lively math class where students engage in solving simple arithmetic problems using various strategies. The teacher encourages different approaches, such as mental math, counting up, and using a number line, to find the answers to problems like 78 minus 5 and 75 minus 7. Students share their methods, demonstrating a range of techniques from straightforward subtraction to more creative problem-solving. The interactive and exploratory nature of the lesson aims to deepen understanding and encourage mathematical thinking.

Takeaways

  • 😀 The transcript involves a classroom discussion on solving simple arithmetic problems using various strategies.
  • 📚 The first problem presented is 5 - 8 = 3, and the students are encouraged to find different ways to solve it.
  • đŸ€” One student solved it by subtracting 5 from 75 and then flipping the result, which is a creative approach to the problem.
  • 📉 Another student used a rounding method, rounding 78 to 80 and then adding 2 to reach 82, before subtracting to find the result.
  • 🔱 The discussion includes breaking down numbers into place value, which helps in understanding the arithmetic process.
  • 🎓 The teacher emphasizes the importance of understanding different strategies for solving arithmetic problems.
  • 📈 A number line strategy is mentioned, where students count up from a known number to find the answer.
  • 📝 The transcript highlights the counting up strategy, where students count from 77 to 78 to reach the next number.
  • đŸ€“ Some students used mental math to quickly solve the problems, showing a good grasp of basic arithmetic.
  • 📊 A student shared a strategy of adding 5 and 8 to reach 13, demonstrating the use of addition in problem-solving.
  • đŸ‘„ The teacher encourages students to share their methods with a neighbor, promoting peer learning and discussion.

Q & A

  • What is the first problem presented in the script?

    -The first problem is a simple subtraction task where the participants are asked to calculate 5 foot 8 minus 5 and 7 minus 7.

  • What is the result of 5 foot 8 minus 5 in the script?

    -The result of 5 foot 8 minus 5 is 3, as the 'foot' unit is not considered in the calculation.

  • How does the script suggest a different approach to the subtraction problem?

    -The script suggests using a number line strategy, rounding numbers to the nearest tens, and then performing the subtraction.

  • What is the alternative method mentioned for finding the difference between 75 and 78?

    -The alternative method involves rounding 78 to 80, then subtracting 80 from 75, and adjusting the result by the difference between the rounded and actual numbers.

  • What is the significance of the number 82 mentioned in the script?

    -The number 82 is mentioned as a point in the alternative subtraction method, where the participant rounds 78 to 80 and then adds 2 to reach 82.

  • How does the script describe the counting up strategy for solving the problem involving 77 and 78?

    -The counting up strategy involves starting at 77 and counting up to 78, recognizing that one more than 77 is 78.

  • What is the place value strategy mentioned in the script?

    -The place value strategy involves breaking down the numbers into their place values and performing calculations based on those individual place values.

  • What is the result of 65 plus 5 plus 8 in the script?

    -The result of 65 plus 5 plus 8 is 78, as the participant uses a combination of addition to reach the final number.

  • How does the script suggest using a number line for the problem involving 70 and 8?

    -The script suggests using a number line to visualize the jump from 70 to 78 by adding 8, which is a more visual and intuitive approach to the problem.

  • What is the final problem presented in the script involving the numbers 70, 60, and 8?

    -The final problem is to find the result of 70 minus 60 and then adding 8, which is a combination of subtraction and addition.

  • What is the outcome of the final problem in the script?

    -The outcome of the final problem is 13, achieved by first subtracting 60 from 70 to get 10, and then adding 8 to reach 13.

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Étiquettes Connexes
Math StrategiesClassroom DynamicsEducational ContentNumber LineCounting UpPlace ValueProblem SolvingInteractive LearningTeaching MethodsStudent Engagement
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