Page 128 - NUMINO Challenge_A2

Communication

9. Planting Trees

Investigate Planting Trees Around a Pond Planting Trees Along a Road

Trees are Trees are 1m
planted 2 m planted 3 m 2 m apart

apart apart 7 6Number of Trees:
, Number of Intervals Between Two Adjacent Trees:

Number of Trees: 6 4Number of Trees: 3 m apart
Number of Intervals
Between Two Adjacent Trees: 6 Number of Intervals 5 4Number of Trees:
, Number of Intervals Between Two Adjacent Trees:
4Between Two Adjacent Trees::

4 m apart

Trees are Trees are 4 3Number of Trees:
planted 4 m planted 6 m , Number of Intervals Between Two Adjacent Trees:

apart apart

3Number of Trees: 2Number of Trees: The number of trees is greater than the number
of intervals by 1.
Number of Intervals Number of Intervals

3Between Two Adjacent Trees:: 2Between Two Adjacent Trees::

The number of trees and the number of intervals
are the same.

Type Study Planting Trees Along Both Sides of a Road
1 Draw apple trees at 6 m distance from each other in the picture.

30 m

There are 6 apple trees.

2 The number of intervals between two adjacent apple trees is 6 1 5. There are two
pine trees between each interval or between every two apple trees.

6m
Therefore, there are 5 2 10 pine trees.

23Answer Key