Pierre had some pastries.
47 of them were shortbreads. The rest were macarons. He sold
25 of the shortbreads and 10 macarons. In the end, he had 152 pastries left. How many pastries did he sell?
| |
Shortbreads |
Macarons |
Comparing pastries
at first |
4x5 =
20 u |
3x5 =
15 u |
Before
|
5x4 =
20 u |
15 u |
Change
|
- 2x4 =
- 8 u |
- 10 |
After
|
3x4 =
12 u |
15 u - 10 |
The number of shortbreads at first is repeated. Make the number of shortbreads at first the same. LCM of 4 and 5 is 20.
Total number of pastries left
= 12 u + 15 u - 10
= 27 u - 10
27 u - 10 = 152
27 u = 152 + 10
27 u = 162
1 u = 162 ÷ 27 = 6
Number of pastries that Pierre sold
= 8 u + 10
= 8 x 6 + 10
= 48 + 10
= 58
Answer(s): 58
