Mark had some pastries.
35 of them were wafers. The rest were puffs. He sold
35 of the wafers and 10 puffs. In the end, he had 38 pastries left. How many pastries did he sell?
| |
Wafers |
Puffs |
Comparing pastries
at first |
3x5 =
15 u |
2x5 =
10 u |
Before
|
5x3 =
15 u |
10 u |
Change
|
- 3x3 =
- 9 u |
- 10 |
After
|
2x3 =
6 u |
10 u - 10 |
The number of wafers at first is repeated. Make the number of wafers at first the same. LCM of 3 and 5 is 15.
Total number of pastries left
= 6 u + 10 u - 10
= 16 u - 10
16 u - 10 = 38
16 u = 38 + 10
16 u = 48
1 u = 48 ÷ 16 = 3
Number of pastries that Mark sold
= 9 u + 10
= 9 x 3 + 10
= 27 + 10
= 37
Answer(s): 37
