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Grade 5-Unit 5-Lesson 15

Kimberly Weise

Created on February 21, 2024

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Transcript

Learning Objective:
Materials No materials are needed today!
We will be able to use different strategies estimate and subtract decimals.
Follow-Up Work Decimal Review

Class Norms

Come to class on time.

Turning on your camera is encouraged!
Use your microphone and chat box to ask or answer questions.

Raise your hand and stay on mute until the teacher calls on you.

Ask questions if you don't understand something.
Try your best.

Be responsible. Be respectful. Be awesome!

Remember: Please follow along with the lesson, and complete the work in the Classkick. If you do not complete the Classkick, you may complete the Edio lesson. You DO NOT need to complete the Classkick AND the Edio lesson.

Pre-Lesson Warm-Up

Practice: Change these whole numbers into decimals. Example: 12 ----> 12.0 or 12.00
15 222 1,290 33,333

Pre-Lesson Warm-Up

Practice: Write an equivalent decimal. Example: 12.3 --- > 12.30
63.50 555.500 99.1 4.0

Revisit the Algorithm

Find the value of 8.53 – 2.7 using the standard algorithm.

Revisit the Algorithm

Find the value of 6.62 - 3.71 using the standard algorithm.

Which place value do you start with to solve this problem?ones tenths hundredths

Estimate and Subtract

Round to the nearest whole number to estimate the difference for 15.27 – 4.3Explain or show your reasoning. What is the value of 15.27 – 4.3? Explain or show your reasoning.

Estimate and Subtract

Round to the nearest whole number to estimate the difference for 16.14 – 9.8Explain or show your reasoning. What is the value of 16.14 - 9.8? Explain or show your reasoning.

Compare Calculations to Evaluate a Difference

Elena and Andre found the value of 622.35 – 71.4. Circle the work that is done correctly.

Compare Calculations to Evaluate a Difference

How can you see without finding the difference that Elena’s answer is not correct?

What's the difference?

Rewrite the subtraction problems vertically (up and down). Remember to line up your decimal points!
316.39 - 120.4
403.52 - 34.9

It's Almost the End of Class???

Yes, it is! Here is what is next:
1. Complete the exit ticket. 2. Make sure you completed the Classkick. 3. Raise your hand to let me know you completed the exit ticket. 4. WAIT until I call on you and say you can go. 5. Complete the Decimal Review section of the lesson. You can stay and work on it, or you can work on it on your own. 6. Turn in the entire lesson.

Exit Ticket

Find the value of 321.87 – 20.4 Explain or show your reasoning.