Ken has 342 mochi balls and Ivan has 602 mochi balls. How many mochi balls must Ivan give to Ken so that Ken will have 52 more mochi balls than Ivan?
| |
Ken |
Ivan |
Total |
| Before |
342 |
602 |
944 |
| Change |
+ ? |
- ? |
|
| After |
1 u + 52 |
1 u |
944 |
The total number of mochi balls remains unchanged after Ivan gives to Ken.
Total number of mochi balls
= 342 + 602
= 944
Total number of mochi balls in the end
= 1 u + 1 u + 52
= 2 u + 52
2 u + 52 = 944
2 u = 944 - 52
2 u = 892
1 u = 892 ÷ 2 = 446
Number of mochi balls that Ivan must give to Ken
= 602 - 446
= 156
Answer(s): 156
