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Choice A

Choice A. 90 students in a school have visited at least two other provinces. If this represents 24% of the students in the school, how many students are in the school?. 90. 90. 90. 90. Whole school. Possible strategies- Estimation. 24 % ≈ 25 % or ¼.

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Choice A

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  1. Choice A 90 students in a school have visited at least two other provinces. If this represents 24% of the students in the school, how many students are in the school?

  2. 90 90 90 90 Whole school Possible strategies- Estimation 24 % ≈ 25 % or ¼ Which is approximately 360. Hence the whole school is < 360? > 360?

  3. 4x90 4x24 24/6 90/6 Diagram 90 90 24% 90 students 96 % 360 students 4% 15 students 100% 375 students 15 90 90

  4. Diagram • 24% = 24/100 = 6/25 (1 colour group) • 4 colour groups fit in a 5x5 square • each colour group represents 90 students • coloured sq’s: 4x90 = 360 students • but 1 square is uncloured • each square is 1/6 of 90 = 15 students So, total is 360(coloured) + 15(uncloured) = 375 students

  5. 375 360 96 % Number Line 90 90 90 90 15 24 % 24 % 24 % 24 % 4 %

  6. ÷2 ÷3 X 25 Friendly Numbers • 24% = 90 students • 12% = 45 students • 4% = 15 students • 100% = 375 students

  7. x25 ÷6 15 90 4% 24% ÷6 x25 Double Number Line 375 100%

  8. x 25 ÷ 2 ÷ 3 45 15 375 12% 4% 100% ÷ 3 ÷ 2 x 25 Ratio Tables

  9. 100 24 x 90 = Elastic Meter Manipulative Manipulative Elastic Meter http://www.edugains.ca/newsite/math2/tipsmanipulativeinstructionalstrategies.html

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