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
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.
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
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.
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.
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