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Percentage – Decrease – 10s – Bingo Method
Students should choose nine answers from the grid and place them randomly into a 3x3 square in their book. You may want to pause your display and choose questions according to difficulty during the game. Depending on time, students could win with a line, an X, or a ‘full house’ (all).
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Decreasing by a Percentage
BINGO! 45 54 23 82 37 12 76 25 91 Decreasing by a Percentage
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Choose your numbers… 240 360 30 250 80 32 180 350 480 100 560 90 120 60 64 300 Draw a 3x3 grid in your book.
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$200 10% = $20 Total = $180 Sarah invested $200.
The money decreased by 10% in one year. How much did she get back? $200 10% = $20 Total = $180
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The money decreased by 20%
Mike invested $300. The money decreased by 20% in one year. How much did he get back? $300 20% = $60 Total = $240
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$600 50% = $300 Total = $300 Sally invested $600.
The money decreased by 50% in one year. How much did she get back? $600 50% = $300 Total = $300
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$500 30% = $150 Total = $350 Alice invested $500.
The money decreased by 30% in one year. How much did she get back? $500 30% = $150 Total = $350
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The money decreased by 40%
John invested $200. The money decreased by 40% in one year. How much did he get back? $200 40% = $80 Total = $120
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The money decreased by 60%
Ahmed invested $200. The money decreased by 60% in one year. How much did he get back? $200 60% = $120 Total = $80
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$500 80% = $400 Total = $100 Vera invested $500.
The money decreased by 80% in one year. How much did she get back? $500 80% = $400 Total = $100
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$80 20% = $16 Total = $64 Anna invested $80.
The money decreased by 20% in one year. How much did she get back? $80 20% = $16 Total = $64
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The money decreased by 70%
Chris invested $200. The money decreased by 70% in one year. How much did he get back? $200 70% = $140 Total = $60
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The money decreased by 40%
Paul invested $600. The money decreased by 40% in one year. How much did he get back? $800 40% = $320 Total = $480
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The money decreased by 10%
Peter invested $400. The money decreased by 10% in one year. How much did he get back? $400 10% = $40 Total = $360
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$500 50% = $250 Total = $250 Ash invested $500.
The money decreased by 50% in one year. How much did she get back? $500 50% = $250 Total = $250
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$300 70% = $210 Total = $90 Lucy invested $300.
The money decreased by 70% in one year. How much did she get back? $300 70% = $210 Total = $90
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The money decreased by 60%
Danny invested $80. The money decreased by 60% in one year. How much did he get back? $80 60% = $48 Total = $32
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$800 30% = $240 Total = $560 Gina invested $800.
The money decreased by 30% in one year. How much did she get back? $800 30% = $240 Total = $560
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$300 90% = $270 Total = $30 Holly invested $300.
The money decreased by 90% in one year. How much did she get back? $300 90% = $270 Total = $30
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tom@goteachmaths.co.uk Questions? Comments? Suggestions?
…or have you found a mistake!? Any feedback would be appreciated . Please feel free to
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