Oscar had some pastries.
27 of them were croissants. The rest were cupcakes. He sold
34 of the croissants and 7 cupcakes. In the end, he had 48 pastries left. How many pastries did he sell?
| |
Croissants |
Cupcakes |
Comparing pastries
at first |
2x2 =
4 u |
5x2 =
10 u |
Before
|
4x1 =
4 u |
10 u |
Change
|
- 3x1 =
- 3 u |
- 7 |
After
|
1x1 =
1 u |
10 u - 7 |
The number of croissants at first is repeated. Make the number of croissants at first the same. LCM of 2 and 4 is 4.
Total number of pastries left
= 1 u + 10 u - 7
= 11 u - 7
11 u - 7 = 48
11 u = 48 + 7
11 u = 55
1 u = 55 ÷ 11 = 5
Number of pastries that Oscar sold
= 3 u + 7
= 3 x 5 + 7
= 15 + 7
= 22
Answer(s): 22
