Lesson 14

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adding and subtracting with scientific notation

Warm Up

Lesson

Summary

Cool

Down

Reflections

Student

Task

Learning

Targets

Practice Problems

Lesson Video

Unit 7

exponents and scientific notation

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14.1 Warm Up - number talk: non-zero digits

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Learning Targets

• I can add and subtract numbers given in scientific notation.

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The purpose of this lesson is to make sense and use quantitative reasoning when making comparisons.

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14.2 measuring the planets

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14.3 celestial dance

1. When you add the distances of Mercury, Venus, Earth, and Mars from the Sun, would you reach as far as Jupiter?

2. Add all the diameters of all the planets except the Sun. Which is wider, all of these objects side by side, or the Sun? Draw a picture that is close to scale.

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14.4 old mcdonald’s massive farm

Use the table to answer questions about different life forms on the planet.

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1. On a farm there was a cow. And on the farm there were 2 sheep. There were also 3 chickens. What is the total mass of the 1 cow, the 2 sheep, the 3 chickens, and the 1 farmer on the farm?
2. Make a conjecture about how many ants might be on the farm. If you added all these ants into the previous question, how would that affect your answer for the total mass of all the animals?
3. What is the total mass of a human, a blue whale, and 6 ants all together?
4. Which is greater, the number of bacteria, or the number of all the other animals in the table put together?

14.4 old mcdonald’s massive farm, cont.

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Lesson Summary

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14.5 Cool Down: adding with scientific notation

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Reflections

• Can I add and subtract numbers given in scientific notation?

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Practice Problems

Must do: All problems

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Lesson Video

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