Virginia SOL Math / Kindergarten / Number & Number Sense

K.NS.1

Counting to 100

What you'll learn

  • Count forward orally from 0 to 100 by ones
  • Count forward by tens to 100
  • Count on from any number less than 100

Words to know

Count —
to say numbers in order
Number —
how many there are
Ones —
counting one at a time
Tens —
counting in groups of ten
Next —
the number that comes after

Why it matters Counting helps us know how many steps we take, how many days until a birthday, and how many toys we have.

Worked examples

Model ItI do

Count by ones from 1 to 10.

Point to each number as you say it: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. Each number is one more than the number before it.

Try It TogetherWe do

Count by tens from 10 to 50.

Start at 10 and add a group of ten each time: 10, 20, 30, 40, 50. Counting by tens is faster than counting by ones.

Now YouYou do

Start at 7 and count on to 12.

Say the next numbers in order after 7. Check your answer in the back of this chapter.

Practice

Mastered 0 of 11

Warm-up

Ease in with the basics.

  1. 1.Count out loud: 1, 2, 3, ___. What number comes next?

  2. 2.What number comes right after 6?

  3. 3.Count by ones: 10, 11, ___. What number comes next?

On Level

The core Quick Check from the book.

  1. 1.What number comes right after 8?

  2. 2.Count by tens: 10, 20, 30, ___.

  3. 3.What number comes right before 5?

  4. 4.Start at 3 and count on: 3, 4, 5, ___.

  5. 5.Count by ones: 15, 16, ___, 18.

Challenge

Stretch your thinking.

  1. 1.Count by tens: 10, 20, 30, 40, 50, 60, 70, ___. What number comes next?

  2. 2.Start at 96 and count on by ones: 96, 97, 98, 99, ___. What number comes next?

  3. 3.Start at 47 and count on by ones. What are the next two numbers after 47?