Whole numbers
Numbers
The number system is a way of representing and organizing quantities .
It provides a frame work for perfroming calculations and solving mathematical problems
Within the number system , we have several tyes of numbers that posses distinct properties and characteristics
Propertis of numbers
Diffrent types of number posses distinct properties based on their characteristics and relation ships,
Here are some key number systems we’ll discuss:
Natural numbers
Whole number
Integers
Rational numbers
Irrational numbers
Number systems
Natural number
1,2,3
Whole numbers
0,1,2,3
Integers
-2,-1,0,1,2
,Rational numbers
-2,-1,0,1,2
Irrational numbers
√5 √3 𝜋
Calculation with whole numbers
Eastimating is a helpful technique to quickly approximation the result of a calculation . it allowas you to have a rough
idea of what the answer might be without performing the exact calculation
Heres how you can estimate
For addition and subtraction : Round the number ot the nearest ten , hundred or thousand and then perform the
calculation using the rounded numbers
For multiplication and division : Round the numbers to the nearest whole number and then perform the calculation
using the rounded numbers .
Examples
Estimate the following : 68+35 round the numbers
To 70 & 40
70
+ 40 Add 70 and 40 to get an
—---- an estimated sum of 110
110
Estimate the following : 43 x 6
40
x6
—-
240
, Rounding
Rounding of involves approximately a number to a specific place value ( such as the nearest ten , hundred, ect) .
Heres how you can round off the numbers :
1. Determine the place value to which you want to round off
2. Look at the digit to the right of the desired place value
3. If the digit is 5 or greater, round up the number by increasing the desired digit by 1 and replacing all digit’s to
the right of the desired place value.
Examples
1 round 3485 to the nearst 100
3485 = 3500
2 round to the nearest 100
24627 = 24600
3 round 9721562 to the nearest 100,000
9721562 = 9700,000
Numbers
The number system is a way of representing and organizing quantities .
It provides a frame work for perfroming calculations and solving mathematical problems
Within the number system , we have several tyes of numbers that posses distinct properties and characteristics
Propertis of numbers
Diffrent types of number posses distinct properties based on their characteristics and relation ships,
Here are some key number systems we’ll discuss:
Natural numbers
Whole number
Integers
Rational numbers
Irrational numbers
Number systems
Natural number
1,2,3
Whole numbers
0,1,2,3
Integers
-2,-1,0,1,2
,Rational numbers
-2,-1,0,1,2
Irrational numbers
√5 √3 𝜋
Calculation with whole numbers
Eastimating is a helpful technique to quickly approximation the result of a calculation . it allowas you to have a rough
idea of what the answer might be without performing the exact calculation
Heres how you can estimate
For addition and subtraction : Round the number ot the nearest ten , hundred or thousand and then perform the
calculation using the rounded numbers
For multiplication and division : Round the numbers to the nearest whole number and then perform the calculation
using the rounded numbers .
Examples
Estimate the following : 68+35 round the numbers
To 70 & 40
70
+ 40 Add 70 and 40 to get an
—---- an estimated sum of 110
110
Estimate the following : 43 x 6
40
x6
—-
240
, Rounding
Rounding of involves approximately a number to a specific place value ( such as the nearest ten , hundred, ect) .
Heres how you can round off the numbers :
1. Determine the place value to which you want to round off
2. Look at the digit to the right of the desired place value
3. If the digit is 5 or greater, round up the number by increasing the desired digit by 1 and replacing all digit’s to
the right of the desired place value.
Examples
1 round 3485 to the nearst 100
3485 = 3500
2 round to the nearest 100
24627 = 24600
3 round 9721562 to the nearest 100,000
9721562 = 9700,000
