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Estimating Totals for 2-Step Word Problems with Chocolate Bars

Khan AcademyJuly 1, 20253 min2,427 views
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Understanding Estimation

  • πŸ’‘ Estimation involves finding friendly numbers that are easy to work with for addition, subtraction, multiplication, and division.
  • 🎯 The goal is to get an answer that is a clean number of hundreds or a similar round figure, not necessarily an exact calculation.

Estimating Values to the Nearest Hundred

  • πŸ“Œ For Friday's sales of 111 chocolate bars, the closest hundred is 100, as 111 is much closer to 100 than 200.
  • πŸ“ˆ For Saturday's sales, 467 is more than halfway between 400 and 500, making 500 the closest hundred.
  • 🍫 Sunday's sales of 294 chocolate bars are very close to 300, so 300 is the best estimate to the nearest hundred.

Calculating the Estimated Total

  • βž• To estimate the total number of chocolate bars sold over the three days, add the estimated values: 100 (Friday) + 500 (Saturday) + 300 (Sunday).
  • πŸ’― The estimated total is 900 chocolate bars.
  • βœ… This estimated total of 900 corresponds to Choice B.
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What’s Discussed

EstimationFriendly NumbersRounding to Nearest Hundred2-Step Word ProblemsChocolate BarsAdditionKhan Academy
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