LEARN NC

K–12 teaching and learning · from the UNC School of Education

Goal 1

Number and Operations - The learner will read, write, model, and compute with whole numbers through 999.

Objective 1.04

Develop fluency with multi-digit addition and subtraction through 999 using multiple strategies.

  • Strategies for adding and subtracting numbers.
  • Estimation of sums and differences in appropriate situations.
  • Relationships between operations.

Resources aligned to this objective

Resources on the web

More and More Buttons
Students use buttons to create, model, and record addition sentences. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Making Glyphs
Students learn a powerful way to display data-using a glyph. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Making Change
Students model prices mentioned in a children's book. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Macaroni Math: Looking Back and Moving Forward
Students apply the mathematical knowledge and skills developed in the previous lessons as they play a new game. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Links Away: Looking Back and Moving Forward
Students review the models for subtraction, use the properties of subtraction, and memorize subtraction facts. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Let's Learn Those Facts: Looking Back and Moving Forward
Students display their knowledge of properties of objects for sorting and creating patterns. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Let's Count to 20: Looking Back and Moving Forward
Students use ten frames and connecting cubes to explore sets of 10 to 20. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
How Many More?
Students write subtraction problems, model them with sets of fish-shaped crackers, and communicate their findings in words and pictures. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
How Many More Fish? Looking Back and Moving Forward
Students use the mathematical knowledge and skills developed in the previous lessons as they play games involving comparative subtraction. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
How Many Left?
Students explore the familiar set model of subtraction. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
How Many Buttons?
Students review classification, make sets of a given number, explore relationships between numbers, and find numbers that are one more and one less than a given number. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Hopping on the Number Line
Students generate sums using the “number line” model. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Hopping Backward to Solve Problems
Students determine differences using the number line to compare lengths. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Hopping Backward on the Number Line
Students generate differences using the number line model. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Food Pyramid Power: Looking Back and Moving Forward
Students display their knowledge of properties of objects for sorting and creating patterns. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Finding the Balance
Students explore another model of subtraction, the balance. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Finding Sums to Six
Students discover the role of the additive identity and explore sums to six. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Finding Fact Families
Students explore the relation of addition to subtraction. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Finding Fact Families
The relationship of subtraction to addition is introduced with a book and with dominoes. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Finding Addition Patterns
Students explore commutativity and examine addition patterns. Then they record known facts on a personal addition chart. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics