4th Grade October Lesson

October - 4th

by Mr. Kevin

​October 4th Grade focuses on...

• ​Math

• ELA

• ​Science

• ​SS

Poll

How do you feel about Math?

• I'm confident

• I'm pretty good

• I'm okay

• I'm not so sure

​Let's talk Place Value!

​Let's review the skill of ROUNDING!

​

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

​

​

11,309,411

​Rounding 11,309,411: Tens

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

​

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

​

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

​

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

​

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

​Rounding 11,309,411: Ten Thousands

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

​

​We are going to focus on 11,309,411

​

​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...

​

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

​Rounding 11,309,411: Millions

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

​

​We are going to focus on 11,309,411.

​

​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...

​

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

​Show me what you know!

​Rounding: 5 questions

Multiple Choice

What is 23,009 rounded to the nearest thousand?

• 20,000

• 23,000

• 23,010

• 13,009

• I don't know

Multiple Select

Sarah had about 530 marbles. What TWO numbers could round to 530?

• 501

• 533

• 525

• 567

• I don't know

Open Ended

How do you feel about r

​Place Value: Comparison and Comparing Numbers

​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!

​10 times greater or less!

​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?

​

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

​

​The 8 in

​Let's Talk Addition!

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

​

​

Let's start by setting up our equation vertically.

​

141

​ + 39

​

​How TO 141+39: The Ones

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

​

​ 1

​ 141

​ + 39

​ 0

​

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