Small Numbers - PowerPoint Presentation

Slide1

Small NumbersSlide2

Learning Goal

LG: Demonstrate

an understanding of place value, including numbers that are:

•

less than one thousandth

Kid friendly: show that you can name the place value of numbers up to three spots after the decimal pointSlide3

What do I think I know?

Examples of where I see small numbersSlide4

Whole, Ten

ths

, Hundred

ths

, Thousand

ths

Decimals and fractions are always

pieces of a whole

The first spot after the decimal is called the

ten

ths.

This means the whole has been divided into 10 pieces.

H

undred

ths

have been divided into 100 pieces

T

housand

ths

have been divided into 1000 piecesSlide5

Whole

Tenths

Hundredths

ThousandthsSlide6

Extend the pattern

50 000 = 5 ten thousands

5 000 = 5 thousands

500 = 5 ____

50 = 5 ____

5 = 5 _____Slide7

Extend the Pattern

0.5 = 5 ______

0.05 = 5 ______

0.005 = 5 _______ Slide8

Ways to Think of Decimals

You could think of a decimal number as a whole number plus tenths, hundredths,

etc

:

Example 1: What is 2.3 ?

On the left side is "2", that is the whole number part.

The 3 is in the "tenths" position, meaning "3 tenths", or 3/10

So, 2.3 is "2 and 3 tenths"Slide9

Practice – What’s your partner’s number?

The goal of this game is to create a small number (either to the tenths, hundredths, or thousandths) that your partner will try to figure out. They are allowed to ask you

15

yes or no questions.

Step

One:

Decide if your number will go to one, two or three blanks after the decimal point.

Step

Two: Roll the dice to fill in each blank space.

Step Three: Write the number underneath with commas in the right

spot. Make sure to keep the number hidden from your partner!

Step

Four: Tell your partner you are ready and then answer all of their questions truthfully

Step Five: When your partner guesses the number correctly they need to say it out loud, write it as a number, write it as a fraction and write it in word form. Now switch places!Slide10
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Small Number Challenge

Create an

EduCreations

video on an

iPad

that demonstrates your understanding of small numbers down to the

thousand

ths

place.Slide13

How?

Instructions:

Choose a number that has three place value spots before a decimal point and three place value points after the decimal

For example

:

789. 123

You must

represent

this number in several ways in your video

Speaking the number out loud

Writing the number in word form

Writing the number in number form

Drawing or creating an image that shows your number

Show your number using base ten blocksExplain what you are doing the entire timeSlide14

First, let's have an example:

Here is the number

"forty-five and six-tenths"

written as a decimal number:

The decimal point goes between units and tenths.Slide15

45.6

has 4 tens, 5 units and 6 tenths, like this:Slide16

As we move left, each position is 10 times bigger!

  Example:

Hundreds

are 10 times bigger than

Tens Slide17

As we move right, each position is 10 times

smaller

.

From

Hundreds

, to

Tens

, to

Units

But what if we continue past Units?

What is

10 times smaller

than Units?

1

/10 ths (Tenths) are! Slide18

But we must first write a

decimal point

,

so we know exactly where the Units position is

three hundred twenty seven

and four tenthsSlide19
Slide20

17.591

On the left of the decimal point is a

whole number (17 for example)

As we move further left,

every place gets

10 times bigger

.  

The first digit on the right means

tenths

(1/10).

As we move further right,

every place gets

10 times smaller

(one tenth as big).