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Question
primary 5 | Maths
| Whole Numbers
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Help please
Date Posted: 5 years ago
Views: 590
Bervyn spent $23.10.
John did not spend any money.
Let John’s final money be 8 units and Bervyn’s final money be 1 unit.
John’s starting money was also 8 units. Since John had twice as much money as Bervyn at first, Bervyn’s starting money was 4 units.
As a result, Bervyn spent 3 units of money away.
3 units = $23.10
1 unit = $23.10 / 3 = $7.70
8 units = $7.70 x 8 = $61.60
so John had $61.60.
John did not spend any money.
Let John’s final money be 8 units and Bervyn’s final money be 1 unit.
John’s starting money was also 8 units. Since John had twice as much money as Bervyn at first, Bervyn’s starting money was 4 units.
As a result, Bervyn spent 3 units of money away.
3 units = $23.10
1 unit = $23.10 / 3 = $7.70
8 units = $7.70 x 8 = $61.60
so John had $61.60.
See 2 Answers
Your final answer vanished.
It’s $61.60.
Edit: Reopened the image and now it’s there.
It’s $61.60.
Edit: Reopened the image and now it’s there.
Isn't it written there? Or do you mean she didn't write the statement?
Weird. The first time I opened the picture I did not see the $61.60 and the picture no longer loaded past the second last line. I saw it now.
Sometimes its buggy. Sometimes, I can type a whole comment and post it, only for nothing to appear and I have to retype again.
Thank u
Ratio method
At first , John : Bervyn = 2 : 1
After, John : Bervyn = 8 : 1
Now, John didn't spend any money. So his money remained at the same amount. We change the first ratio such that the units for John's money are the same for both ratios.
At first , John : Bervyn = 2 : 1 = 8 : 4
So we can see that John had 8 units at first and Bervyn had 4 units at first. She spent 3 units and was left with one unit.
3 units = $23.10
1 unit = $23.10 ÷ 3 = $7.70
John has 8 units at first, so 8 units = $7.70 x 8 = $61.60
At first , John : Bervyn = 2 : 1
After, John : Bervyn = 8 : 1
Now, John didn't spend any money. So his money remained at the same amount. We change the first ratio such that the units for John's money are the same for both ratios.
At first , John : Bervyn = 2 : 1 = 8 : 4
So we can see that John had 8 units at first and Bervyn had 4 units at first. She spent 3 units and was left with one unit.
3 units = $23.10
1 unit = $23.10 ÷ 3 = $7.70
John has 8 units at first, so 8 units = $7.70 x 8 = $61.60
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