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Count objects to 20

Counting objects to 20 involves coordinating one number word with each object exactly once, saying the counting sequence in order, and understanding that the final number said represents the total quantity. The quantity remains unchanged when objects are rearranged or spaced differently, and it can be represented with numerals, ten-frames, or a number line, supporting comparison, addition, and later place-value understanding.

Detailed Explanation: Count objects to 20

To count objects, match one number word to each object:

  1. Start at one end.
  2. Touch or point to each object once.
  3. Say the counting numbers in order: (1,2,3,…)(1, 2, 3,\ldots)
  4. The last number you say tells how many objects there are.

Example: Count the stars.

⋆⋆⋆⋆⋆⋆⋆\star\quad \star\quad \star\quad \star\quad \star\quad \star\quad \star ⋆⋆⋆⋆⋆⋆⋆\star\quad \star\quad \star\quad \star\quad \star\quad \star\quad \star

Touch each star once while counting:

  • First row: (1,2,3,4,5,6,7)(1, 2, 3, 4, 5, 6, 7)
  • Second row: (8,9,10,11,12,13,14)(8, 9, 10, 11, 12, 13, 14)

The last number said is (14)(14), so there are (14)(14) stars.

It does not matter if the stars are moved closer together or farther apart. If there are still the same stars, there are still (14)(14) stars.

Learn by doing: Count objects to 20

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    Ten Groups - Count, Less than 20

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