Julian has 177 beads and Billy has 432 beads. How many beads must Billy give to Julian so that Julian will have 81 less beads than Billy?
|
Julian |
Billy |
Total |
Before |
177 |
432 |
609 |
Change |
+ ? |
- ? |
|
After |
1 u |
1 u + 81 |
609 |
The total number of beads remains unchanged after Billy gives to Julian.
Total number of beads
= 177 + 432
= 609
Total number of beads in the end
= 1 u + 1 u + 81
= 2 u + 81
2 u + 81 = 609
2 u = 609 - 81
2 u = 528
1 u = 528 ÷ 2 = 264
Number of beads that Billy must give to Julian
= 264 - 177
= 87
Answer(s): 87