Standards

NC.3.NBT.2

Add and subtract whole numbers up to and including 1,000.

• Use estimation strategies to assess reasonableness of answers.
• Model and explain how the relationship between addition and subtraction can be applied to solve addition and subtraction problems.
• Use expanded form to decompose numbers and then find sums and differences.

NC.3.OA.8

Solve two-step word problems involving addition, subtraction, and multiplication, representing problems using equations with a symbol for the unknown number.

Skills

1. Use expanded form to decompose numbers to solve addition and subtraction problems.
2. Apply the relationship between addition and subtraction to solve problems.
3. Solve two-step word problems using the addition and subtraction.

Vocabulary

• Addition • Addend • Sum • Regroup

• Place Value • Equation • Unknown • Place Value Drawing

• Expression • Subtraction • Missing Addend

• Difference • Ungroup • More • Fewer

• Decompose • Subtotals • Expanded Form • Expanded Method

• Number Line • Precision • Partition • Greater

• Value • Rounding • Inverse Operation • Nearest Multiple

• Estimation • Exact • About • Reasonable

• Actual • Symbol • Comparison • Put Together/Take Apart

• Operation • Compare • Relationship •

• Lesser • Situation

Resources for Parents

Anchor Charts