Respuesta :
Answer:
6 books
Step-by-step explanation:
15+ 15= 30
30+15=45
45+15=60
60+15=75
75+15=90
We see 15 6 times. 15 x 6= 90
90/6= 15
Answer:
6 books
Step-by-step explanation:
15+ 15= 30
30+15=45
45+15=60
60+15=75
75+15=90
We see 15 6 times. 15 x 6= 90
90/6= 15