First Grade Number and Operations in Base Ten Tasks


Understand place value. (1.NBT.2 - 1.NBT.3)


1.NBT.2 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).

Additional

Standards Assessed

Task

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1.NBT.3 Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.

Task

Blackline Master

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