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Laabri

RCN Lesson 10: Finding Sums and Differences using Standard Algorithm

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Last updated over 3 years ago
13 Nsɛmmisa

Jump Start - (5 min)

Find the Differences. No calculator

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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.

Asemmisa {{asɛmmisaAhyɛnsode}}
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Asemmisa {{asɛmmisaAhyɛnsode}}
2.

Launch - Standard Algorithm

I'll model

We'll try

You try

Watch me while I...

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Asemmisa {{asɛmmisaAhyɛnsode}}
3.

Lets try one together.

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Asemmisa {{asɛmmisaAhyɛnsode}}
4.

Now You Try!

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

(Remember to use our current year!)

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Asemmisa {{asɛmmisaAhyɛnsode}}
6.

How old is Jada's grandmother now?

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Asemmisa {{asɛmmisaAhyɛnsode}}
7.

How old is Jada's grandfather now?

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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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Asemmisa {{asɛmmisaAhyɛnsode}}
10.

Complete the Table.

Lesson Synthesis - (5 min)

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Asemmisa {{asɛmmisaAhyɛnsode}}
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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Asemmisa {{asɛmmisaAhyɛnsode}}
12.

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

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Asemmisa {{asɛmmisaAhyɛnsode}}
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?

Asemmisa {{asɛmmisaAhyɛnsode}}
5.

Challenge!

Asemmisa {{asɛmmisaAhyɛnsode}}
8.

How old is Jada's great-grandmother now?

Asemmisa {{asɛmmisaAhyɛnsode}}
9.

How old is Jada's great-grandfather now?