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26 December, 13:19

Reiner wants to save $40 to buy a gift for his dad. Reiner's neighbor will pay him weekly to mow the lawn, but Reiner always gives a $2 donation to the food bank in weeks when he earns money. He calculates that it will take him 5 weeks to earn the money for his dad's gift. He draws a bar model to represent the situation.

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  1. 26 December, 13:29
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    Earned money = weeks x (salary - donation)

    = 5 x (40 - 2)

    = $190

    Donated money = weeks x donation

    = 5 x 2

    = $10
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