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RCN Lesson 10: Finding Sums and Differences using Standard Algorithm

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Last updated almost 3 years ago
13 questions

Activity 2 - Bees Population

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Develop Understanding
Today's Learning Goal (G4, U4, L21-23):
  • Interpret and solve problems that involve finding sums and differences of multi-digit whole numbers
  • Add and subtract multi-digit whole numbers using the standard algorithm.
  • Use place value understanding to make reasonable estimates
Today's Materials:
  • Laptop
  • Laptop charger
  • Pen/Pencil/Paper (optional)
Please complete the Jump Start (activator). You have 5 minutes before we review. This is independent it should be silent.
Reminders:
1. Ready for class
2. No cellphones
3. Volume must be low.
4. Read and follow all directions
5.) Take your bag off and immediately begin the Activator.
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Launch - Standard Algorithm

I'll model

We'll try

You try

Watch me while I...
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Activity 1 - What is your Age? (10 minutes)

(Remember to use our current year!)
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Question 6
6.

How old is Jada's grandmother now?

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An entomologist records the number of bees in their beehive over the course of several months. They record:
  • the number of bees at the beginning of the month
  • how many bees left (and didn’t return) during the month
  • how many new bees were added to the hive during the month Unfortunately, some of the entries in the table are missing. Complete the missing information in the table.
Question 10
10.

Complete the Table.

Lesson Synthesis - (5 min)


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Question 11
11.

We explored how the population of bees can change over time.
What did you learn today about the mathematics an entomologist might use as part of their work?

Cool Down - (5 min)

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Question 12
12.

Was the total population of the three cities more than one million people? Explain or show your reasoning.

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Question 13
13.

How much over or under one million is the total? Explain or show your reasoning.

Khan Academy for the rest of class!

Closure Questions:
  • How can what we learn today help you in the real world?
  • How do you feel about this materal?

Jump Start - (5 min)

Find the Differences. No calculator

Question 1
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Question 2
2.

Question 3
3.

Lets try one together.

Question 4
4.

Now You Try!

Question 5
5.

Challenge!

Question 7
7.

How old is Jada's grandfather now?

Question 8
8.

How old is Jada's great-grandmother now?

Question 9
9.

How old is Jada's great-grandfather now?