Simon had some pastries.
27 of them were shortbreads. The rest were cookies. He sold
35 of the shortbreads and 5 cookies. In the end, he had 140 pastries left. How many more shortbreads than cookies did he sell?
| |
Shortbreads |
Cookies |
Comparing pastries
at first |
2x5 =
10 u |
5x5 =
25 u |
Before
|
5x2 =
10 u |
25 u |
Change
|
- 3x2 =
- 6 u |
- 5 |
After
|
2x2 =
4 u |
25 u - 5 |
The number of shortbreads at first is repeated. Make the number of shortbreads at first the same. LCM of 2 and 5 is 10.
Total number of pastries left
= 4 u + 25 u - 5
= 29 u - 5
29 u - 5 = 140
29 u = 140 + 5
29 u = 145
1 u = 145 ÷ 29 = 5
Number of more shortbreads than cookies that Simon sold
= 6 u - 5
= 6 x 5 - 5
= 30 - 5
= 25
Answer(s): 25
