Question Video: Identifying the Group of Money That Is Equal to a Given Amount Mathematics

Which of the following is equal to £47?

03:18

Video Transcript

Which of the following is equal to 47 pounds?

We’re shown four different amounts of money. We have to count these groups of money to find out which is equal to 47 pounds. Let’s start by counting the first group. We’ve ordered the money from the notes with the greatest value, the 20-pound notes, down to the coin with the least value, which is the two-pound coin. Now we can count forward on the number line to find the total amount of money shown.

Let’s start by counting our two 20-pound notes. We need to count forward in 20s: 20, 40. Now we need to count forward 10 to add our 10-pound note. 10 more than 40 is 50. We need to count forward five from 50 to add our five-pound note. Start at 50, 51, 52, 53, 54, 55. Five more than 50 is 55. We already know that this group of coins is not equal to 47 pounds, but let’s finish counting. We just need to count forward two to add the two-pound coin. Two more than 55 is 57. So we know this is not the group we’re looking for. Let’s write the total amount just to remind us, 57 pounds.

Is this group of notes and coins worth 47 pounds? Let’s count to find the total. Again, we’ve got two 20-pound notes, so we need to count forward by 20 two times: 20, 40. Next, we need to count our three two-pound coins. So we need to start at 40 and count forward in twos three times. 42, 44, 46. Again, we’re very close to 47 pounds. We just got one more coin to add, and it’s a one-pound coin. One more than 46 is 47. This group of coins and notes is equal to 47 pounds. 20, 40, 42, 44, 46, 47.

This group is equal to 45 pounds. 10, 20, 30, 35, 40, 42, 44, 45. Let’s quickly count how much this group is worth. 20, 30, 40, 45, 46, 47, 48, 49. These notes and coins are worth 49 pounds. We picked the amount of notes and coins equal to 47 pounds.

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