Grandmother baked 12 cookies. She wants to give all of the cookies to her 5 grandchildren equally. She doesn't like crumbs, so she wants all of the cookies to remain whole. How many more cookies could she bake? Is this the only amount? How do you know? Show your work.

Solution

G r an d m o t h er bak e d 12 coo ki es . S h e w an t s t o g i v e a ll o f t h e coo ki es t o h er 5 g r an d c hi l d re n e q u a ll y . S h e d oes n^{'} t l ik e cr u mb s, so s h e w an t s a ll o f t h e coo ki es t o re main w h o l e . Ho w man y m ore coo ki es co u l d s h e bak e ? I s t hi s t h e o n l y am o u n t ? Ho w d o yo u kn o w ? S h o w yo u r w or k .

7

Solution steps

Subtract the numbers:

12 - 5

= 7