1st Grade Videos - Understand place value.


Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

  • 10 can be thought of as a bundle of ten ones - called a "ten."
  • The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
  • The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two, three, four, five, six, seven, eight, or nine tens (and 0 ones).

Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.


Screenshot Name / Description Flag? Rating
Khan - Adding Multi-digit Whole Numbers
Adding larger number with tens and ones (1:32)

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