lesson

2. Lesson 7
Counting Whole
Numbers
by 2s, 5s, and 10s
Through 100

3. What are the counting
numbers?
Counting
numbers are set
of numbers that
we count.

4. Can you tell the missing numbers?

5. Skip counting is counting numbers by asking
other counting numbers as in by 2s, by 5s, by
10s, or by 100s.
Skip counting
by 2:
2 4 6 8 1
0
1
2
1
4
1
6
1
8
20
How many numbers do we use to count 20 objects if you
skip count by 2s?
2
1 3 4 5 6 7 8 9 1
0

6. 2, 4, 6, 8, 10,
12 …
These three dots
mean “and so
on”.
We count in the
same way as the
counting before
the three dots.
+
2
+
2
+
2
+
2
+
2
+
2
+
2
+
2
+
2
+
2
+
2

7. Skip counting
by 3:
3 6 9 15
1
2
1
8
2
1
24 27 3
0

8. Skip counting
by 3:
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3
+
3

9. Skip counting
by 5:
5 1
0
1
5
2
0
2
5
+
5
+
5
+
5
+
5
+
5

10. Skip counting
by 10:
2
0
3
0
40 5
0
6
0
7
0
8
0
9
0
10
0

11. +
10
+
10
Counting by 10s is another way. We count
faster when we skip count. Skip counting
helps us count faster.
+
10
+
10
+
10
+
10
+
10
+
10
+
10
+
10

12. Seatwork #1: Write the missing numbers based on the given counting
patterns. Copy and answer the given problem on your Math notebook.