'of' can be translated into multiply so
9/10 of 90=9/10 times 90
90=90/1
9/10 times 90/1=(9 times 90)/10=810/10=81/1 times 10/10=81
If the machine makes 5 buttons at a time,and each doll gets 5 buttons then one doll is the answer
Do you have any answer choices? That would help a lot.
Hi, i think the answer 20/3 hope this helped :D