Glen has 310 mochi balls and Billy has 782 mochi balls. How many mochi balls must Billy give to Glen so that Glen will have thrice as many mochi balls as Billy?
|
Glen |
Billy |
Total |
Before |
310 |
782 |
1092 |
Change |
+ ? |
- ? |
|
After |
3 u |
1 u |
4 u |
Total number of mochi balls
= 310 + 782
= 1092
Total number of mochi balls
= 3 u + 1 u
= 4 u
4 u = 1092
1 u = 1092 ÷ 4 = 273
Number of mochi balls that Billy must give Glen
= 782 - 273
= 509
Answer(s): 509