Dana had 168 stamps. Ben had 12 of what Dana had. After Dana used some of his stamps and Ben used 12 of his stamps, Dana had 13 as many stamps left as Ben.
- How many stamps did Ben have at first?
- How many stamps did Dana use?
| |
Dana |
Ben |
| Before |
168 |
84 |
| Change |
- ? |
- 42 |
| After |
14 |
42 |
(a)
Number of stamps that Ben had at first
=
12 x 168
= 84
(b)
Number of stamps that Ben used
=
12 x 84
= 42
Number of stamps that Ben had left
= 84 - 42
= 42
Number of stamps that Dana had left
=
13 x 42
= 14
Number of stamps that Dana used
= 168 - 14
= 154
Answer(s): (a) 84; (b) 154
