Rachel had 72 balloons.
13 of the balloons burst and she gave away
14 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 |
- 1 u |
|
|
| After |
3 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 Rachel had left
= 3 u
= 3 x 12
= 36
Answer(s): 36
