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Published byTheodore Carr Modified over 8 years ago
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1 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? Choice A
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2 Possible Strategies – Estimation 24 % ≈ 25 % or ¼ 90 Whole school Which is approximately 360. Hence the whole school is 360?
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3 Diagram 24% 90 students 96 % 360 students 4% 15 students 100% 375 students 4×24 4×90 24/6 90/6 90 15
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4 Diagram 24% = 24/100 = 6/25 (1 colour group) 4 colour groups fit in a 5×5 square Each colour group represents 90 students Coloured squares: 4×90 = 360 students 1 square is not coloured Each square is 1/6 of 90 = 15 students So, total is 360 (coloured) + 15 (not coloured) = 375 students
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5 Number Line 24 % 4 % 90 15 96 % 360 375
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6 Friendly Numbers 24% = 90 students 12% = 45 students 4% = 15 students 100% = 375 students ÷2 ÷3 ×25
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7 Double Number Line 4% 1590 24% 100% 375 ÷6 ×25
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Ratio Tables 90 24 % ÷ 2 ÷ 3 × 25 45 12%100% 375 4% 15
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9 Elastic Meter Manipulative 100 24 x 90 = Elastic Metre
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