Standards Map

Mathematics > Grade 1 > Number and Operations in Base Ten
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Mathematics | Grade : 1

Domain - Number and Operations in Base Ten

Cluster - Understand place value.

[1.NBT.B.2] - Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases:

Resources:

    Predecessor Standards:

    • K.NBT.A.1
      Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones

    Successor Standards:

    • 2.NBT.A.1
      Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:

    Same Level Standards:

    • 1.NBT.A.1
      Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.
    • 1.NBT.B.3
      Compare two two-digit numbers based on meanings of the tens and ones digits, recording the results of comparisons with the symbols >, =, and <.
    • 1.NBT.C.4
      Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten.
    • 1.NBT.C.5
      Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used. Identify arithmetic patterns of 10 more and 10 less than using strategies based on place value.
    • 1.NBT.C.6
      Subtract multiples of 10 in the range 10–90 from multiples of 10 in the range 10–90 (positive or zero differences), using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used.