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).

Printing To print handouts from slides - Select the slide from the left. Then click: File > Print > ‘Print Current Slide’ To print multiple slides - Click on a section title to highlight all those slides, or press ‘Ctrl’ at the same time as selecting slides to highlight more than one. Then click: File > Print > ‘Print Selection’ To print double-sided handouts - Highlight both slides before using ‘Print Selection’. Choose ‘Print on Both Sides’ and ‘Flip on Short Edge’.

Decreasing by a Percentage BINGO! 45 54 23 82 37 12 76 25 91 Decreasing by a Percentage

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.

$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

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

$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

$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

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

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

$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

$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

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

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

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

$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

$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

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

$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

$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

tom@goteachmaths.co.uk Questions? Comments? Suggestions? …or have you found a mistake!? Any feedback would be appreciated . Please feel free to email: tom@goteachmaths.co.uk