1.nbt.1 Worksheets

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Previous Standard Determine the unknown whole number in an addition or subtraction equation relating to three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = ?– 3, 6 + 6 = ?.
Next Standard 10 can be thought of as a bundle of ten ones - called a "ten."
Number and Operations in Base Ten Extend the counting sequence. 1Count 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.