There are some wafers in the jar. On Friday, Ivan ate
57 of the wafers. He later bought 26 wafers and added into the jar. On Saturday, Ivan ate 36 wafers. He was hungry and ate another 30 wafers. There were no wafers left. How many wafers were there in the jar at first?
|
Wafers |
Before |
7 u |
Change 1 |
- 5 u |
Change 2 |
+ 26 |
Change 3 |
- 36 |
Change 4 |
- 30 |
After |
0 |
Fraction of the wafers left after Ivan first ate on Friday
= 1 -
57=
27Number of wafers left after Ivan first ate on Friday = 2 u
2 u = 30 + 36 - 26
2 u = 40
1 u = 40 ÷ 2 = 20
Number of wafers at first
= 7 u
= 7 x 20
= 140
Answer(s): 140