Here are the solutions to the problems:
a) Count the number of triangles.
Step 1: Count the triangles in the first group.
There are 24 triangles.
△△△△△△△△△△△△△△△△△△△△△△△△=24
The total count is 24.
b) Perform the addition.
Step 1: Add the numbers.
600000+7000=607000
The sum is 607000.
c) Count