Lesson 20 More or Less than 10?
Let’s decide if there are more or fewer than 10 things in a group.
Warm-up Estimation Exploration: Close to 10
Record an estimate that is:
too low | about right | too high |
---|---|---|
Activity 1 Use 10 to Estimate
Write “more” or “fewer” to finish each sentence.
I think there are than 10 pencils.
How many pencils are there?
I think there are than 10 pencils.
How many pencils are there?
I think there are than 10 pencils.
How many pencils are there?
I think there are than 10 pencils.
How many pencils are there?
I think there are than 10 pencils.
How many pencils are there?
Activity 2 Could She Be Right?
Elena says there are about 11 snowflakes.
Do you think she could be right?
Why or why not?Elena says there are about 8 flowers.
Do you think she could be right?
Why or why not?Elena says there are about 11 suns.
Do you think she could be right?
Why or why not?
Activity 3 Centers: Choice Time
Choose a center.
Shake and Spill
![Center. Shake and Spill.](../../../../../downloads/8d8b2f09--cup-counters.png)
Number Race
![Center. Number Race.](../../../../../downloads/7d4261a4--Number-Race.png)
Grab and Count
![Center. Grab and Count.](../../../../../downloads/831f4860--GrabAndCount.png)
What’s Behind My Back?
![Center. What's Behind My Back.](../../../../../downloads/04de3281--2.1.A-Student-Pages.ConnectingTowers-(1).png)
Pattern Blocks