Ivory had 72 balloons.
13 of the balloons burst and she gave away
34 of the good balloons. How many balloons did she have left?
|
Good balloons |
Burst balloons |
Total balloons |
Comparing good and burst balloons at first |
2x2 = 4 u
|
1x2 = 2 u
|
3x2 = 6 u
|
Before |
4 u |
2 u |
|
Change |
- 3 u |
|
|
After |
1 u |
2 u |
|
The number of good balloons is repeated. Make the number of good balloons the same. LCM of 2 and 4 is 4.
Total number of balloons at first = 6 u
1 u = 72 ÷ 6 = 12
Number of balloons that Ivory had left
= 1 u
= 12
Answer(s): 12