Math - 3rd Grade, Common Core Printables

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CCSS Printables - Grade 3 Math - Answer Keys

Welcome to our Common Core Printables Answer Key Section for 3rd 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 - 3rd GradeMeasurement and DataWord Problems: Driving Between Cities < 12 Hours Apart (CCSS.Math.Content.3.MD.A.1)Word Problems: Time to Minutes Within Hour (CCSS.Math.Content.3.MD.A.1)Number and Operations in Base TenRound 3-Digit Whole Number to Nearest Ten (CCSS.Math.Content.3.NBT.A.1)Round 3-Digit Whole Number to Nearest Hundred (CCSS.Math.Content.3.NBT.A.1)Round 2-Digit Whole Number to Nearest Ten (CCSS.Math.Content.3.NBT.A.1)Subtract 2-Digit from 3-Digit Number With Regrouping (CCSS.Math.Content.3.NBT.A.2)Add two three-digit numbers so that the total is within 1000 (CCSS.Math.Content.3.NBT.A.2)Add a three-digit and two-digit number so that the total is within 1000 (CCSS.Math.Content.3.NBT.A.2)Subtract 3-digit from 3-digit number (CCSS.Math.Content.3.NBT.A.2)Subtract 2-digit from 3-digit number (CCSS.Math.Content.3.NBT.A.2)Complete the 3-Digit Addition Equation (CCSS.Math.Content.3.NBT.A.2)Complete the 3-Digit Subtraction Equation (CCSS.Math.Content.3.NBT.A.2)Subtract 3-Digit from 3-Digit Number with Regrouping (CCSS.Math.Content.3.NBT.A.2)Balance the 3-Digit Addition Equation (CCSS.Math.Content.3.NBT.A.2)Balance the 3-Digit Subtraction Equation (CCSS.Math.Content.3.NBT.A.2)Balance the 3-Digit Addition or Subtraction Equation (CCSS.Math.Content.3.NBT.A.2)Multiply a one-digit by a two-digit multiple of ten number (CCSS.Math.Content.3.NBT.A.3)Number and Operations -- FractionsReduce the fraction to lowest terms (CCSS.Math.Content.3.NF.A.3.b)Complete to Generate an Equivalent Fraction (CCSS.Math.Content.3.NF.A.3.b)Select the Equivalent Fraction (CCSS.Math.Content.3.NF.A.3b)Compare Two Fractions with Same Numerator or Denominator (>,<,=) (CCSS.Math.Content.3.NF.A.3.d)Order two fractions from smallest to largest (CCSS.Math.Content.3.NF.A.3.d)Order two fractions from largest to smallest (CCSS.Math.Content.3.NF.A.3.d)Order three fractions from smallest to largest (CCSS.Math.Content.3.NF.A.3.d)Order four fractions from smallest to largest (CCSS.Math.Content.3.NF.A.3.d)Order three fractions from largest to smallest (CCSS.Math.Content.3.NF.A.3.d)Order four fractions from largest to smallest (CCSS.Math.Content.3.NF.A.3.d)Operations and Algebraic ThinkingDetermine the unknown whole number in an equation (CCSS.Math.Content.3.OA.A.4)Determine the unknown whole number in a multiplication equation (CCSS.Math.Content.3.OA.A.4)Determine the unknown whole number in a division equation (CCSS.Math.Content.3.OA.A.4)