Sabrina had 210 stamps. Archie had 57 of what Sabrina had. After Sabrina used some of his stamps and Archie used 15 of his stamps, Sabrina had 16 as many stamps left as Archie.
- How many stamps did Archie have at first?
- How many stamps did Sabrina use?
| |
Sabrina |
Archie |
| Before |
210 |
150 |
| Change |
- ? |
- 30 |
| After |
20 |
120 |
(a)
Number of stamps that Archie had at first
=
57 x 210
= 150
(b)
Number of stamps that Archie used
=
15 x 150
= 30
Number of stamps that Archie had left
= 150 - 30
= 120
Number of stamps that Sabrina had left
=
16 x 120
= 20
Number of stamps that Sabrina used
= 210 - 20
= 190
Answer(s): (a) 150; (b) 190
