There are some biscuits in the jar. On Thursday, Xavier ate
18 of the biscuits. He later bought 30 biscuits and added into the jar. On Friday, Xavier ate 36 biscuits. He was hungry and ate another 29 biscuits. There were no biscuits left. How many biscuits were there in the jar at first?
|
Biscuits |
Before |
8 u |
Change 1 |
- 1 u |
Change 2 |
+ 30 |
Change 3 |
- 36 |
Change 4 |
- 29 |
After |
0 |
Fraction of the biscuits left after Xavier first ate on Thursday
= 1 -
18=
78Number of biscuits left after Xavier first ate on Thursday = 7 u
7 u = 29 + 36 - 30
7 u = 35
1 u = 35 ÷ 7 = 5
Number of biscuits at first
= 8 u
= 8 x 5
= 40
Answer(s): 40