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Mathematics · Grade 1

Addition Meanings and Strategies

Learners solve joining and putting-together stories within 20, including stories where the missing number is the part that was added. They add by counting on from the greater number, and use turn-around facts and smart grouping (make a ten first) to add two or three numbers.

  • 3 lessons
  • About 60 minutes
  • Addition check: 8 questions
  • Ways to answer: fill in the blanks, choose an answer, match pairs, type a number, place on a number line and sort into groups
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What learners will discover

  • Solve add-to and put-together story problems within 20, including when the change is unknown, and write an equation with a box or blank for the unknown.
  • Add by counting on from the greater number, using a number line or fingers.
  • Use turn-around facts and grouping to add two or three numbers, such as adding the pair that makes 10 first.

Lessons

  1. Addition stories 6 steps4 practiceabout 20 min
  2. Count on from the greater number 6 steps3 practiceabout 20 min
  3. Turn around and group 7 steps4 practiceabout 20 min
  4. Addition check 8 questions at the end

Keep exploring

Games to practice with

  • Number-Line HopHelp the frog hop to the right number — from counting to negative fractions.
  • Paint by AnswersSolve each space, dip your brush and watch a picture come to life.
  • Number TrainAll aboard! Load exactly the right number of animals onto the train.

More 1st grade math

Guide for grown-ups