MATHEMATICS CLASSIV SYLLABUS Cycle 1 Chapter 1 Large Numbers Chapter 2 Addition RECAPITUALTION Read and write 4 digit numbers Place Value and Face value Expanded form Successor and Predecessor ID: 1008983
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1. VIRTUAL LEARNING RESOURCEMATHEMATICSCLASS-IV
2. SYLLABUS: Cycle 1Chapter 1: Large NumbersChapter 2: Addition
3. RECAPITUALTIONRead and write 4 digit numbersPlace Value and Face valueExpanded form Successor and PredecessorForming greatest and smallest 4 digit numberComparing numbers
4. PLACE VALUE & FACE VALUE Place value is the value of each digit in a number based on its position Face value is the digit itself regardless of its position in the number Example: Let’s find the place value and face value of digits in the number 7,945
5. Place value ChartWe use the place value chart to read and write numbersHundredsTensOnesThousands
6. Expanded Form200305 Expanded Form: Writing a number as the sum of the place value of its digits i.e 200 + 30 + 5 = 235HundredsTensOnes
7. How Many?200 + 30 + 7 300 + 20 + 7 700 + 30 + 2HundredsTensOnes
8. 243 423 234HundredsTensOnes
9. HundredsTensOnesThousands10002004031000 + 200 + 40 + 31,243
10. HundredsTensOnesThousands20003002052000 + 300 + 20 + 52,325
11. Which number shows three thousand six hundred eighty two in standard form?3, 862 6,3823, 682 3, 286
12. Which number is the word name for 6,112?seven hundred twelvesix thousand twenty-onesix thousand one hundred twelvesix thousand one hundred two
13. Which number is the word name for 1,423?One thousand four hundred thirty threeOne thousand three hundred forty threeOne thousand two hundred thirty twoOne thousand four hundred twenty three
14. FORMING GREATEST AND SMALLEST NUMBERSGreatest 4 digit numbers: Arrange the digits in descending orderSmallest 4 digit numbers: Arrange the digits in ascending order. If any of the digits is 0 we put it in the hundreds placeExample 1: Form greatest and smallest 4 digit number using the digits 6,1,5,9Greatest Number: Smallest Number: Example 2: Form smallest 4 digit number using the digits 7,0,1,8Smallest Number:ThHTo9651ThHTo9651ThHTo1078
15. SUCCESSOR & PREDECESSORSuccessor: A number that comes just after a given number is called its successor. Successor = Given Number + 1Example : i. Successor of 3459 is 3459 + 1= 3460 ii. Successor of 9999 is 9999 + 1= 10,000( 10,000 is the smallest 5 Digit number)Predecessor: A number that comes just before a given number is called its predecessor. Predecessor = Given Number - 1Example : i. Predecessor of 2678 is 2678 - 1= 2677 ii. Predecessor of 10,000 is 10,000 - 1= 9999( 9999 is the greatest 4 Digit number)
16. COMPARING NUMBERSRule 1: DIFFERENT NUMBER OF DIGITS If two or more numbers to be compared do not have the same number of digits, the number with more number of digits is greater. Example 3456 > 456Rule 2 : SAME NUMBER OF DIGITSWhen the number of digits is the same in two numbers, then we start comparing the first digit from left in each number. If it is the same in both the numbers, we move to the second digit, and so on. Example: 3456 > 3356 3356 > 3346 3346 > 3336 and so on.
17. Home Assignment:1. Write the number name: i. 6732 ii. 99992. Write the expanded form of the number 26093. Write the successor of the following: i. 1196 ii. 62794. Write the predecessor of the following: i. 6120 ii. 20505. Compare number using sign for greater than, less than i. 7894 ____ 7829 ii. 8234 ____ 7334 6. Form the greatest and the smallest number using the digits 3,9,1,0Now enjoy the mental math quiz PPT uploaded.