**Count:**

To say numbers one after the other in order, or to calculate the number of people or things in a group.

**Count by 10s to 120:**

We can use ten frames to count 10s to 120:

12 tens are 120.

One hundred twenty.

**Use ten – frames to count by 10s**

**Example1**:

How can you count to 60 by tens?

**Sol**:

I can use ten frames to count by 10s.

**Example2:**

How can you count to 90 by tens?

**Sol**:

**Use a pattern to count by 10s:**

**Pattern:**

A repeating arrangement of numbers, colors, and shapes.

The above numbers follow ‘0 ‘in one’s place.

**Write the missing numbers:**

Sam wrote a pattern. He forgot to write some numbers.

What numbers did Sam forget to write?

50, 60, 70, ______, 90, ______, 110, 120.

**Sol:**

50, 60, 70, ______, 90, ______, 110, 120.

Skip count by 10s

70 after 80

90 after 100

Sam forgets 80 and 100

50, 60, 70, 80, 90, 100, 110, 120.

**Concept Map:**

### What we have learned

- Count by 10s to 120
- Use ten frames to count by 10s
- Use pattern to count by 10s
- Count by 10s. Write number and number word.
- Write missing numbers

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