Question Video: Identifying the Group of Coins That Equal a Number of Piasters Mathematics

Which of the following represents 100 piastres?

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Video Transcript

Which of the following represents 100 piastres? Is it 50 piastres plus 25 piastres plus 25 piastres? One pound plus 50 piastres. Is it one pound plus 25 piastres plus 25 piastres? Or is it 25 piastres plus 25 piastres plus 25 piastres?

In this question, we have to find the group of coins which represents 100 piastres. We could use this bar model to help. We know the whole amount or the amount we’re looking to make is 100 piastres. We have a coin worth 50 piastres and two 25s. We know that double 25 is 50 and double 50 equals 100. 50 plus 25 plus 25 equals 100 piastres. These coins represent 100 piastres. If we have a one-pound coin and a 50-piastres coin, we’ve got more than 100 piastres because the one-pound coin is worth 100 piastres. 100 plus 50 is 150.

This group of coins also represents 150 piastres. 100 plus 25 plus 25 equals 150. And the total of our three 25-piastre coins is 75. 25 plus 25 plus 25 equals 75. This is the group of coins which represents 100 piastres.

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