Question

Elena's diagram for 372 has 7 tens. The one for 372 : 3 has only 6 tens. Why? Where

did the extra ones blocks (small squares) come from?​

Answer 1

one ten was traded for ten ones

Explanation:

372 cannot be divided by 3 easily. However, 360 +12 can be divided by 3 easily, so it makes sense to trade one of the seven tens for ten ones. That will leave 6 tens, but give twelve ones.

370 +2 = 360 +12 . . . . where the "+" numbers are the numbers of ones