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New Jersey - Grade 1 - Math - Numbers and Operations in Base Ten - Tens & Ones - 1.NBT.2

Description

Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: A. 10 can be thought of as a bundle of ten ones — called a “ten.” B. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones. C. 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 Info

  • State - New Jersey
  • Standard ID - 1.NBT.2
  • Subjects - Math Common Core
  • Grade - 1

Keywords

  • Math
  • New Jersey grade 1
  • Numbers and Operations in Base Ten

More New Jersey Topics

Given a two-digit number, mentally find 10 more or 10 less than the number, without having to count; explain the reasoning used.

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.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 (e.g., base ten blocks) 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.

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.

Order three objects by length; compare the lengths of two objects indirectly by using a third object.

Here is the skill that New Jersey requires you to master

  • Grade Level 1
  • State Test PARCC
  • State Standards New Jersey Core Curriculum Content Standards
  • Subject Math
  • Topic Name Tens & Ones
  • Standard ID 1.NBT.2
  • Description
    Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: A. 10 can be thought of as a bundle of ten ones — called a “ten.” B. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones. C. 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).

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