Lesson 3 Count to Add and Subtract

    • Let’s solve story problems.

Warm-up Choral Count: Forward and Backward

Let’s start at 20 and count backward to 1.

Activity 1 Ride the Bus

  1. There were 7 people on the bus.
    Then 1 more person got on the bus.
    How many people are on the bus now?

    Show your thinking using objects, drawings, numbers, or words.

  2. There were 10 people on the bus.
    Then 1 person got off the bus.
    How many people are on the bus now?

    Show your thinking using objects, drawings, numbers, or words.

Activity 2 Singing Students

  1. students were singing.
    Then 1 more student came to sing with them.
    How many students are singing now?

    Show your thinking using objects, drawings, numbers, or words.

  2. students were singing.
    Then 1 student stopped singing and went home.
    How many students are singing now?

    Show your thinking using objects, drawings, numbers, or words.

Activity 3 Centers: Choice Time

Choose a center.

Less, Same, More
Center. Less, Same, More.
Math Fingers
two hands showing 8 fingers
Tower Build
Center. Tower Build.
Math Stories
Center. Math Stories.
Which One