Daniel had some pastries.
25 of them were tarts. The rest were scones. He sold
34 of the tarts and 6 scones. In the end, he had 15 pastries left. How many pastries did he sell?
| |
Tarts |
Scones |
Comparing pastries
at first |
2x2 =
4 u |
3x2 =
6 u |
Before
|
4x1 =
4 u |
6 u |
Change
|
- 3x1 =
- 3 u |
- 6 |
After
|
1x1 =
1 u |
6 u - 6 |
The number of tarts at first is repeated. Make the number of tarts at first the same. LCM of 2 and 4 is 4.
Total number of pastries left
= 1 u + 6 u - 6
= 7 u - 6
7 u - 6 = 15
7 u = 15 + 6
7 u = 21
1 u = 21 ÷ 7 = 3
Number of pastries that Daniel sold
= 3 u + 6
= 3 x 3 + 6
= 9 + 6
= 15
Answer(s): 15
