Place Value and Number Forms

Numbers: Values and Forms

Review and Practice

Directions

• In this activity, you will read some information and answer some questions

• Make sure you read everything and follow along carefully

The next slides is about value vs place value

There is a picture with text to read, a page to read, and questions

Look at this carefully

Things to remember

• The value of a number is the amount

• For example, the value of the 2 in 213 is "200"

• The place value os a number is the place it is in

• For example, the place value of the 2 in 213 is the hundreds place

Multiple Choice

The value of the 8 in 1,283,192 is...

• thousands

• ten thousands

• 8

• 8,000

• 80,000

Multiple Choice

The place value of the 7 in 2,732,937

• thousands

• ten thousands

• hundred thousands

• 70,000

• 700,000

The next slides is about times 10 and divided by 10

There are 2 picture with text, several pages of text, and several questions. Read carefully.

Read everything carefully

Things to remember

• As the same number goes to the left, it gets 10 times bigger.

• For example, a 4 in the hundreds place is 10 times bigger than a 4 in the tens place. (See 1 slide back)

• As the same number goes to the right, it gets 10 times smaller. This means it s one-tenth of it or divided by 10.

• For example, a 4 in the tens place is one-tenth of a 4 in the hundreds place (See 1 slide back)

Multiple Choice

A 5 in the thousands place is 10 times greater than a 5 in the...

• hundreds place

• ten-thousands place

Quick reminder...

• When you see a problem like this:

• 5 hundreds x 10= ___ _______ = ____ ______

• You first figure out your multiplication. So 5x10=50 and then you put the same unit in the blank

• 5 hundreds x 10= 50 hundreds = ____ ______

• Now think, what is 50 hundreds equal to... 5 thousands!

• So the correct answer is...

• 5 hundreds x 10= 50 hundreds = 5 thousands

Quick reminder...

• When you see a problem like this:

•  $7\ hundreds\div10=$  ___ hundreds

• You first figure out your division. Well, I can' divide 7 into 10 peices so I rewrite it

•  $7\ hundreds\div10$  is the same as  $700\div10$  
  

• I can simplify  $700\div10$  and solve  $70\div1$   instead by crossing out common zeros (zero trick)

•  $70\div1=70$  which is 7 tens 
  

• So, that means  $7\ hundreds\div10=7\ tens$  

Multiple Choice

One tenth means to...

• divide by 10

• multiply by 10

• divide by anything

• multiply by anything

The next slides are about different forms of numbers

There are 2 picture with text, several pages of text, and several questions. Read carefully.

There are 3 forms of numbers we have learned about

• Standard form

• Expanded form

• Word form

Standard Form

• Standard from the the normal way to write numbers

• 132,192 is an example of a number written in standard form

• A tricky part is commas

• Remember: they go in groups of 3

• See the picture to the right? It shows commas separating groups of 3

Multiple Choice

Select the correct standard form of this number: seven hundred twenty-one thousand, two hundred eleven

• 700,21,200,11

• 72,1211

• 721,211

• 700,000+20,000+1,000+200+10+1

Expanded form

• Expanded form is another way to write a number

• It stretches the number out by seperating the number into it's values

• For example, the number 7,193 in expanded form is:

• 7,000 + 100 + 90 + 3

• Don't forget your commas and plus signs

This is the "upside down staris" that Sophia and I showed you in class

Multiple Choice

Select the expanded form of this number: 2,811,433

• 20,000,000+8,000,00+

  11,000+400+30+3

• 2,000,000+800,000+

  10,000+1,000+400+30+3

• 2,000,000+800,000+

  11,000+400+30+3

Word form

• Word form in another way to write a number

• You spell it out exactly as you read the number

• NO numbers at all

• For example, 1,234,567 is written as:

• one million, two hundred thirty-four thousand, five hundred sixty-seven

• Make sure you have commas and dashes

• Dashes go in between a ten and a one. It connects "best friends" like twenty-three or seventy-six

Multiple Choice

Select the correct word form for this number: 9,123,401

• nine million, one hundred thousand, twenty-three thousand,four hundred one

• 9 million, 1 hundred 23 thousnad, 4 hundred 1

• nine million one hundred twenty three thousand four hundred and one

• nine million, one hundred twenty-three thousand, four hundred one

Before you go...

please answer the question on the next slide

Poll

How did you feel about a lesson like this? Was it helpful to have tips and pictures along with questions

• It was neat but not much more help

• It was confusing. I'm not a fan.

• It helped me a lot! I want to do more like this!

• It helped me a little. I'd ike to see this again sometimes.