Half of 30 equals what?
The tens blocks represent 30. Three tens make 30. We have to calculate half of 30. To find a half of 30, we need to make two equal groups or divide 30 by two. To make two equal groups, we could place one tens rod in each group. Then, we’ll have one tens rod left. If we break this 10 in half, we can put five in one group and five in the other group. 10 and five is 15.
We divided 30 into two equal groups. Each group has 15. Half of 30 equals 15.