Sean had some pastries.
25 of them were cupcakes. The rest were cookies. He sold
56 of the cupcakes and 13 cookies. In the end, he had 17 pastries left. How many pastries did he sell?
| |
Cupcakes |
Cookies |
Comparing pastries
at first |
2x3 =
6 u |
3x3 =
9 u |
Before
|
6x1 =
6 u |
9 u |
Change
|
- 5x1 =
- 5 u |
- 13 |
After
|
1x1 =
1 u |
9 u - 13 |
The number of cupcakes at first is repeated. Make the number of cupcakes at first the same. LCM of 2 and 6 is 6.
Total number of pastries left
= 1 u + 9 u - 13
= 10 u - 13
10 u - 13 = 17
10 u = 17 + 13
10 u = 30
1 u = 30 ÷ 10 = 3
Number of pastries that Sean sold
= 5 u + 13
= 5 x 3 + 13
= 15 + 13
= 28
Answer(s): 28
