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RCN Lesson 10: Finding Sums and Differences using Standard Algorithm

Last updated over 2 years ago
13 questions
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.

Jump Start - (5 min)

Find the Differences. No calculator

Required
1

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1

Launch - Standard Algorithm

I'll model

We'll try

You try

Watch me while I...
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0

Lets try one together.

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Now You Try!

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Challenge!

Activity 1 - What is your Age? (10 minutes)

(Remember to use our current year!)
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How old is Jada's grandmother now?

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How old is Jada's grandfather now?

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How old is Jada's great-grandmother now?

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How old is Jada's great-grandfather now?

Activity 2 - Bees Population

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.
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Complete the Table.

Lesson Synthesis - (5 min)


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0

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)

Required
4

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

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4

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?