Page 34 - Revised Maths Wisdom Class - 3

32 MATHS

COGNITIVE

MAP

4-Digit Numbers

© G. Ram Books (P.) Ltd.©

Rememberable Points Reading 4-Digit Number

 Greatest 3-digit number 999 Read 1489
 Smallest 4-digit number 1000
 Greatest 4-digit number 9999 Thousands Hundreds Tens Ones Places
1 4 8 9 Number

1 thousand 4 hundreds 8 tens 9 ones

80 + 9 Last two digits
must be added
Face Value One thousand four hundred eighty nine

“It is actual value of a digit”
face value of 7 in 6790 is 7
Place Value

Place value of digit = Face value × Position value of that digit
i.e. place value of 5 in 9567 is 500

Face value and Place value of 0 is always 0, wherever it may be in the number

Expanded Form Successor and Predecessor
7945 7000 + 900 + 40 + 5 Number + 1 = Successor
5672 5000 + 600 + 70 + 2 Number – 1 = Predecessor

Greatest and Smallest Number using 4-Digits

Greatest Number Given digits must be placed in descending order
Smallest Number Given digits must be placed in ascending order