Grade 1 Number and Operations in Base Ten Free Bundle

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• FREE topics on Grade 1 Number and Operations in Base Ten domain
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• FREE 10-item quiz
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This fantastic bundle includes FREE worksheets and quiz items about Number and Operations in Base Ten. These ready-to-use Common Core-aligned, Grade 1 Math worksheets, are perfectly paired with premium End-of-Year test booklets.

Common Core Standards (1.NBT)

Extend the counting sequence.

1. Count to 120, starting at any number less than 120. In this range, read
   and write

Understand place value.

2. 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).

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

Use place value understanding and properties of operations to add
and subtract.

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

Resource Examples

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