George had some pastries.
25 of them were biscuits. The rest were puffs. He sold
56 of the biscuits and 18 puffs. In the end, he had 52 pastries left. How many more biscuits than puffs did he sell?
| |
Biscuits |
Puffs |
Comparing pastries
at first |
2x3 =
6 u |
3x3 =
9 u |
Before
|
6x1 =
6 u |
9 u |
Change
|
- 5x1 =
- 5 u |
- 18 |
After
|
1x1 =
1 u |
9 u - 18 |
The number of biscuits at first is repeated. Make the number of biscuits at first the same. LCM of 2 and 6 is 6.
Total number of pastries left
= 1 u + 9 u - 18
= 10 u - 18
10 u - 18 = 52
10 u = 52 + 18
10 u = 70
1 u = 70 ÷ 10 = 7
Number of more biscuits than puffs that George sold
= 5 u - 18
= 5 x 7 - 18
= 35 - 18
= 17
Answer(s): 17
