Tim had some pastries.
35 of them were puffs. The rest were biscuits. He sold
25 of the puffs and 14 biscuits. In the end, he had 43 pastries left. How many pastries did he sell?
| |
Puffs |
Biscuits |
Comparing pastries
at first |
3x5 =
15 u |
2x5 =
10 u |
Before
|
5x3 =
15 u |
10 u |
Change
|
- 2x3 =
- 6 u |
- 14 |
After
|
3x3 =
9 u |
10 u - 14 |
The number of puffs at first is repeated. Make the number of puffs at first the same. LCM of 3 and 5 is 15.
Total number of pastries left
= 9 u + 10 u - 14
= 19 u - 14
19 u - 14 = 43
19 u = 43 + 14
19 u = 57
1 u = 57 ÷ 19 = 3
Number of pastries that Tim sold
= 6 u + 14
= 6 x 3 + 14
= 18 + 14
= 32
Answer(s): 32
