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

Balancing Discoveries
This lesson, one of a nine-part unit from Illuminations titled “Do It with Dominoes,” encourages students to explore another model of addition, the “balance” model. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Balancing
Students are encouraged to explore another model of subtraction—the balance. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics
Addend Pairs to 12
Students explore pairs of numbers that add to 12 or less by playing a game. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: National Council of Teachers of Mathematics