Math - 1st Grade, Common Core Printables

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CCSS Printables - Grade 1 Math - Answer Keys

Welcome to our Common Core Printables Answer Key Section for 1st Grade Math!

Here you will find the answers to our thousands of practice worksheets tied to the Common Core State Standards.
Just select an area from the list below:

Math - 1st GradeNumber and Operations in Base TenWrite the number of tens and ones (CCSS.Math.Content.1.NBT.B.2)Order two 2-digit numbers from smallest to largest (CCSS.Math.Content.1.NBT.B.3)Order Three 2-Digit Numbers from Smallest to Largest (CCSS.Math.Content.1.NBT.B.3)Order Two 2-Digit Numbers from Largest to Smallest (CCSS.Math.Content.1.NBT.B.3)Order Three 2-Digit Numbers from Largest to Smallest (CCSS.Math.Content.1.NBT.B.3)Compare Two 2-Digit Numbers (>,<,=) (CCSS.Math.Content.1.NBT.B.3)Add a two-digit and a two-digit multiple of ten number so that the total is within 100. (CCSS.Math.Content.1.NBT.C.4)Add two one-digit numbers (CCSS.Math.Content.1.NBT.C.4)Add a two-digit and one-digit number so that the total is within 100 (CCSS.Math.Content.1.NBT.C.4)Find 10 more, given two-digit number (CCSS.Math.Content.1.NBT.C.5)Find 10 less, given two-digit number (CCSS.Math.Content.1.NBT.C.5)Subtract multiples of 10 from multiples of 10 (CCSS.Math.Content.1.NBT.C.6)Operations and Algebraic ThinkingIs the equation true or false? (CCSS.Math.Content.1.OA.D.7)Determine the Unknown Number in the Addition Equation (up to 20) (CCSS.Math.Content.1.OA.D.8)Determine the Unknown Number in the Addition or Subtraction Equation (up to 20) (CCSS.Math.Content.1.OA.D.8)Determine the unknown number in each equation (CCSS.Math.Content.1.OA.D.8)Determine the Unknown Number in the Subtraction Equation (up to 20) (CCSS.Math.Content.1.OA.D.8)