01-1-Place Value

Place Value : 

Place Value also known as “reading really big numbers”

Numeral Recognition : 

Numeral Recognition Do you know these numbers?

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81 72 38 17 55 43 29 94 35 51 67 395 33 69 45 46 97 184 164 430 751 448 625 984 483 574 906 8 709 3 088 4 206 1 101 4 507 8 065 9 991 7 639 2 567 5 432 1 357 1 024 89 673 24 389 42 045 21 394 79 421 81 407 45 607 67 089 34 675 30 788 70 140 90 407

How do we “read” a number? : 

How do we “read” a number? When it’s a smaller number, we can tell at a glance… For example, we can easily identify as thirty-four – we say it without thinking. Trick question… Do you read a number from left to right or from right to left? 34

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The answer is BOTH! Before we can read a number we need to know the place value of each digit. When we see the number We need to start from the right-hand side to work out the place value of each digit. 4 5 3 8

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4 5 3 8 units tens hundreds thousands So now that you know the place value it is a simple matter of reading each digit with its place value… 8 thousand 4 hundred (five tens) and 50 (units) 3

So let’s look at a really huge number… can you say this one? : 

So let’s look at a really huge number… can you say this one? We need to do the same thing that we did with the smaller number – start from right to left to work out the place value of each digit… 8 3 6 5 2 8 6 7 9 4 1 9 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions Now we need to read each section. That’s why we write numbers with a gap between each section – to make them easier to read. Notice the groups of three digits? So now read each section

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2 1 9 4 7 1 4 3 8 7 5 6 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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3 3 3 4 4 4 5 5 5 6 6 6 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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8 3 7 2 1 4 3 7 9 2 8 5 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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9 0 4 2 6 5 3 1 8 7 1 2 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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4 2 9 4 3 1 6 0 7 9 5 3 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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4 3 8 7 5 6 1 0 3 2 9 1 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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5 7 3 2 9 0 4 8 7 5 0 9 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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5 7 6 1 3 2 8 9 7 0 6 0 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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1 9 4 5 7 2 1 3 8 7 9 9 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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7 3 3 5 7 2 1 1 1 9 0 0 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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4 0 3 9 8 5 6 1 0 8 2 2 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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8 6 9 1 3 7 6 2 9 1 2 3 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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6 4 2 9 7 5 2 6 8 1 3 5 units tens hundreds thousands 10s of thousands 100s of thousands millions 10s of millions 100s of millions billions 10s of billions 100s of billions So let's try another... 1. Name each digit's place value 2. Look for the groups of three digits 3. Read the number in groups, saying how many billions, how many millions, how many thousands etc

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Got it? Great! Powerpoint prepared by Janice Fleming TPS 2010