Shiyun made 552 shortbreads and tarts. After she gave 0.1 of the shortbreads and 0.75 of the tarts to her girls, she was left with an equal number of shortbreads and tarts. How many tarts had she left?
| |
Shortbreads |
Tarts |
Before
|
10x1 =
10 u |
4x9 =
36 u |
Change
|
- 1x1 =
- 1 u |
- 3x9 =
- 27 u |
After
|
9x1 =
9 u |
1x9 =
9 u |
Comparing shortbreads and
tarts in the end |
1x9 =
9 u |
1x9 =
9 u |
0.1 =
110 0.75 =
75100 =
34 The number of shortbreads and tarts is the same in the end. Make the number of shortbreads and tarts in the end the same. LCM of 9 and 1 and 1 is 9.
Total number of shortbreads and tarts at first
= 10 u + 36 u
= 46 u
46 u = 552
1 u = 552 ÷ 46 = 12
Number of tarts that Shiyun had left
= 9 u
= 9 x 12
= 108
Answer(s): 108
