Zoe has some marbles. She has 12 less marbles in Box B than in Box C. After 20 marbles were transferred from Box C to Box B, there were 82 marbles in Box C.
- How many marbles were there in Box C at first?
- How many marbles were there in Box B in the end?
|
Box B |
Box C |
Before |
1 u |
1 u + 12 |
Change |
+ 20 |
- 20 |
After |
1 u + 20 |
82 |
(a)
Number of marbles in Box C at first
= 82 + 20
= 102
(b)
Number of marbles in Box B at first
= 102 - 12
= 90
Number of marbles in Box B in the end
= 90 + 20
= 110
Answer(s): (a) 102; (b) 110