Oscar had some pastries.
25 of them were macarons. The rest were croissants. He sold
35 of the macarons and 19 croissants. In the end, he had 38 pastries left. How many pastries did he sell?
| |
Macarons |
Croissants |
Comparing pastries
at first |
2x5 =
10 u |
3x5 =
15 u |
Before
|
5x2 =
10 u |
15 u |
Change
|
- 3x2 =
- 6 u |
- 19 |
After
|
2x2 =
4 u |
15 u - 19 |
The number of macarons at first is repeated. Make the number of macarons at first the same. LCM of 2 and 5 is 10.
Total number of pastries left
= 4 u + 15 u - 19
= 19 u - 19
19 u - 19 = 38
19 u = 38 + 19
19 u = 57
1 u = 57 ÷ 19 = 3
Number of pastries that Oscar sold
= 6 u + 19
= 6 x 3 + 19
= 18 + 19
= 37
Answer(s): 37
