An array is made when items are arranged in rows and columns. This array has 12 counters. Every row in an array is the same length and every column in an array is the same length. This array has 4 ...

Don’t panic, we just need to answer the calculation to open the door. Something tells me that was not the correct answer. But 12 minus nine is three, three divided by three is one, and one plus 12 is ...