Addition and subtraction 1

Students practice adding three-digit numbers that require regrouping in one or more places.

3.NBT.A.2: Flexibly and efficiently add and subtract within 1,000 using strategies based on place value, properties of operations, ...

Students subtract three-digit numbers with regrouping, including subtracting across zeros.

3.NBT.A.2: Flexibly and efficiently add and subtract within 1,000 using strategies based on place value, properties of operations, ...

Students use the standard algorithm for addition and subtraction within 1,000 and verify results using inverse operations.

3.NBT.A.2: Flexibly and efficiently add and subtract within 1,000 using strategies based on place value, properties of operations, ...

Students use rounding and estimation to assess the reasonableness of their addition and subtraction answers.

3.NBT.A.2: Flexibly and efficiently add and subtract within 1,000 using strategies based on place value, properties of operations, ...

Students interpret two-step word problems and represent them using equations with a letter for the unknown quantity.

3.OA.D.7: Solve two-step word problems, posed with whole numbers and having whole number answers, using the four operations.

Students solve two-step word problems that involve both addition and subtraction of whole numbers.

3.OA.D.7: Solve two-step word problems, posed with whole numbers and having whole number answers, using the four operations.

Students solve two-step word problems that combine addition, subtraction, multiplication, or division.

3.OA.D.7: Solve two-step word problems, posed with whole numbers and having whole number answers, using the four operations.

Students use estimation and mental math to determine whether solutions to two-step word problems are reasonable.

3.OA.D.7: Solve two-step word problems, posed with whole numbers and having whole number answers, using the four operations.