Penelope baked 39 cookies. She ate
23 of them.
- How many cookies had she eaten?
- How many cookies had she left?
(a)
Total number of cookies baked = 3 u
3 u = 39
1 u = 39 ÷ 3 = 13
Number of cookies that Penelope ate
= 2 u
= 2 x 13
= 26
(b)
Number of cookies that Penelope had left
= 39 - 26
= 13
Answer(s) : (a) 26; (b) 13