Perry had 423 marbles and Fanny had 343 marbles. After Perry gave Fanny some marbles, both of them have the same number of marbles. How many marbles did Perry give Fanny?
|
Perry |
Fanny |
Difference |
Before |
423 |
343 |
80 |
Change |
- ? |
+ ? |
|
After |
1 u |
1 u |
0 |
The total number of marbles remains unchanged after Perry gave Fanny some marbles.
The number of marbles that each had in the end is the same.
Number of more marbles that Perry had than Fanny
= 423 - 343
= 80
Number of marbles that Perry gave Fanny
= 80 ÷ 2
= 40
Answer(s): 40