Fred had some pastries.
35 of them were shortbreads. The rest were muffins. He sold
56 of the shortbreads and 18 muffins. In the end, he had -3 pastries left. How many pastries did he sell?
| |
Shortbreads |
Muffins |
Comparing pastries
at first |
3x2 =
6 u |
2x2 =
4 u |
Before
|
6x1 =
6 u |
4 u |
Change
|
- 5x1 =
- 5 u |
- 18 |
After
|
1x1 =
1 u |
4 u - 18 |
The number of shortbreads at first is repeated. Make the number of shortbreads at first the same. LCM of 3 and 6 is 6.
Total number of pastries left
= 1 u + 4 u - 18
= 5 u - 18
5 u - 18 = -3
5 u = -3 + 18
5 u = 15
1 u = 15 ÷ 5 = 3
Number of pastries that Fred sold
= 5 u + 18
= 5 x 3 + 18
= 15 + 18
= 33
Answer(s): 33
