There are some tarts in the jar. On Monday, Bobby ate
13 of the tarts. He later bought 21 tarts and added into the jar. On Tuesday, Bobby ate 37 tarts. He was hungry and ate another 38 tarts. There were no tarts left. How many tarts were there in the jar at first?
|
Tarts |
Before |
3 u |
Change 1 |
- 1 u |
Change 2 |
+ 21 |
Change 3 |
- 37 |
Change 4 |
- 38 |
After |
0 |
Fraction of the tarts left after Bobby first ate on Monday
= 1 -
13=
23Number of tarts left after Bobby first ate on Monday = 2 u
2 u = 38 + 37 - 21
2 u = 54
1 u = 54 ÷ 2 = 27
Number of tarts at first
= 3 u
= 3 x 27
= 81
Answer(s): 81