kirdy
contestada

Dave collects rocks. he makes 12 groups of 10 rocks and has none left over. How many rocks does Dave have?

Respuesta :

that means he has 120 rocks
12*10=120

Susuu
12 groups, and each one containing 10. 
Think about it. Which operation could we use?

Multiplication!

12*10 = 120

Dave has 120 rocks. 

(One nice rock collection, Dave) 
;-)