Perry had some pastries.
37 of them were tarts. The rest were cookies. He sold
56 of the tarts and 19 cookies. In the end, he had 53 pastries left. How many pastries did he sell?
| |
Tarts |
Cookies |
Comparing pastries
at first |
3x2 =
6 u |
4x2 =
8 u |
Before
|
6x1 =
6 u |
8 u |
Change
|
- 5x1 =
- 5 u |
- 19 |
After
|
1x1 =
1 u |
8 u - 19 |
The number of tarts at first is repeated. Make the number of tarts at first the same. LCM of 3 and 6 is 6.
Total number of pastries left
= 1 u + 8 u - 19
= 9 u - 19
9 u - 19 = 53
9 u = 53 + 19
9 u = 72
1 u = 72 ÷ 9 = 8
Number of pastries that Perry sold
= 5 u + 19
= 5 x 8 + 19
= 40 + 19
= 59
Answer(s): 59
