Natalie and Erika had an equal number of stickers at first. Natalie used
15 of her stickers and Erika used
110 of her stickers. They used 18 stickers altogether. How many stickers did Erika have in the end?
| |
Natalie |
Erika |
| Before |
5x2 =
10 u |
10x1 =
10 u |
| Change |
- 1x2 =
- 2 u |
- 1x1 =
- 1 u |
| After |
4x2 =
8 u |
9x1 =
9 u |
The number of stickers that Natalie and Erika each had at first is the same. Make the number of stickers that Natalie and Erika each had at first the same. LCM of 5 and 10 is 10.
Number of stickers that Natalie and Erika used
= 2 u + 1 u
= 3 u
3 u = 18
1 u = 18 ÷ 3 = 6
Number of stickers that Erika had in the end
= 9 u
= 9 x 6
= 54
Answer(s): 54
