4th Grade October Lesson

• ​Math

• ELA

• ​Science

• ​SS

​Let's review the skill of ROUNDING!

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​Let's round this number to the tens, ten thousands, and MILLIONS!

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11,309,411

​Let's start by rounding 11,309,411 to the tens place.

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​We can do this by focusing on 11,309,411

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​I know that 11 is in between 10 and 20. Remember this, 4 down, round down, 5 up round up.

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​I know that the 1 in the ones place is 4 down, so it rounds to 10.

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​I know that 11,309,411 rounded to the nearest ten is 11,309,410.

​Let's try this, but with the TEN THOUSANDS PLACE.

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​We are going to focus on 11,309,411

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​I know that 9,411 is in between 0 and 10 thousand. When I look at the hundred's place, there is a 4. 4 round down, so...

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​I know that 11,309,411 rounded to the nearest ten thousand is 11,310,000.

​Let's try the same number, but rounding it to the millions!

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​We are going to focus on 11,309,411.

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​I know that 1,309,411 is in between 1,000,000 and 2,000,000. I see a 3, and 3 rounds down so...

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​11,309,411 rounded to the nearest million is...11,000,000.

​Rounding: 5 questions

​We are going to about place comparison. We learned in 3rd grade our multiplication facts. Let me give you a multiplication fact. 3x1=3. Now, I will give you 3x10=30. Did you see that I added a 0 to the 1 and then the product added a 0 to it. If I continue, 3x100=300, the pattern keeps on GOING!

​What is the value of the colored digit? 763,839?

​800, right?

​What is the value of the colored digit? 888,369

​8,000, right?

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​I'm going to show you an example of a comparison between places.

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​The 8 in

​Let's try out 141 + 39. Let's use the STANDARD ALGORITHM!

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Let's start by setting up our equation vertically.

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141

​ + 39

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​NOW>>>Let's start by regrouping the ones, tens then hundreds.

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​ 1

​ 141

​ + 39

​ 0

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​Look at what I did. I did 1 +9 = 10, and put that 1 ten into the tens place.