Shiyun had some chikoo and orange face masks.
14 of them were chikoo. She gave away
12 of the chikoo face masks and
16 of the orange face masks. In the end, she had 36 chikoo and orange face masks altogether. How many orange face masks did Shiyun have at first?
| |
Chikoo face masks |
Orange face masks |
Total |
Comparing chikoo and orange face masks
at first |
1x2 =
2 u |
3x2 =
6 u |
4x2 =
8 u |
Before |
2 u |
6x1 =
6 u |
|
Change |
- 1 u |
- 1x1 =
- 1 u |
|
After |
1 u |
5x1 =
5 u |
|
The number of orange face masks at first is repeated. Make the number of orange face masks the same. LCM of 3 and 6 is 6.
Total number of face masks in the end
= 1 u + 5 u
= 6 u
6 u = 36
1 u = 36 ÷ 6 = 6
Number of orange masks at first
= 6 u
= 6 x 6
= 36
Answer(s): 36
