class 5. first two rules of rounding numbers rules of rounding numbers to round a number to the...
TRANSCRIPT
CLASS 5
first two rules of rounding numbers
RULES OF ROUNDING NUMBERS To round a number to the
nearest, we round it to the multiple of ten nearest to it
A number which is midway is always rounded up.
Examples:26 is rounded to 30;132 is to 130 ; 825 is rounded 830
Second two rules of rounding numbers
To round a number to the nearest hundred, we round it to the multiple of hundred nearest to it.A number which is midway is always round up.
Examples:826 is rounded to 800;1259 is round to 1300 850 is rounded to 830.
Third two rules of rounding numbers
To round a number to the nearest thousand, we round it to the multiple of thousand nearest to it.A number which is midway is always rounded up.Examples:426 is rounded to 500;1259 is rounded to 10002500 is rounded to 3000.
Rounding large numbers.
We can now extend the rule of rounding off, to the nearest ten thousand, lakh,ten lakh and so on.
If digit in the thousands place is 8 since 8 > 5, the number 38249 is closer to 40000.
Rounding to nearest ten thousands
Rounding to nearest lakh
If the digit in ten thousands place is 4;<5 so we will not round it up.
2,56,293Digit in the ten thousands place is 5; 5>= 5
So change 2 to 3
Number is rounded to 3,00,000.