Shannon had 297 erasers. Ian had 23 of what Shannon had. After Shannon used some of his erasers and Ian used 13 of his erasers, Shannon had 12 as many erasers left as Ian.
- How many erasers did Ian have at first?
- How many erasers did Shannon use?
|
Shannon |
Ian |
Before |
297 |
198 |
Change |
- ? |
- 66 |
After |
66 |
132 |
(a)
Number of erasers that Ian had at first
=
23 x 297
= 198
(b)
Number of erasers that Ian used
=
13 x 198
= 66
Number of erasers that Ian had left
= 198 - 66
= 132
Number of erasers that Shannon had left
=
12 x 132
= 66
Number of erasers that Shannon used
= 297 - 66
= 231
Answer(s): (a) 198; (b) 231