There are some cookies in the jar. On Monday, Mark ate
27 of the cookies. He later bought 28 cookies and added into the jar. On Tuesday, Mark ate 44 cookies. He was hungry and ate another 34 cookies. There were no cookies left. How many cookies were there in the jar at first?
|
Cookies |
Before |
7 u |
Change 1 |
- 2 u |
Change 2 |
+ 28 |
Change 3 |
- 44 |
Change 4 |
- 34 |
After |
0 |
Fraction of the cookies left after Mark first ate on Monday
= 1 -
27=
57Number of cookies left after Mark first ate on Monday = 5 u
5 u = 34 + 44 - 28
5 u = 50
1 u = 50 ÷ 5 = 10
Number of cookies at first
= 7 u
= 7 x 10
= 70
Answer(s): 70