Page 24 - Maths Skills - 7

22 Maths

MIND MAP

Integers

Integer Number
I = {...., –3, –2, –1, 0, 1, 2, 3....}

Positive Integer {1, 2, 3, 4 .........} Zero Number {0} Negative Integer {–1, –2, –3 .........}

Absolute Value
Natural Number Whole Number Absolute value of an integer ‘p’ is | P |.
N = {1, 2, 3, 4 ......} W = {0, 1, 2, 3 ......} It has only numerical value not its sign.
e.g. | –5 | = 5
| 5 | = 5

Integers on Number Line

Negative Positive Solution with ‘Sign’
integers integers � (+) + (+) = +
–6 –5 –4 –3 –2 –1 0 1 2 3 4 5 � (–) + (–) = –
� Negative integers are always located towards the left of zero. � (+) × (+) = +
� Positive integers are always located towards the right of zero. � (–) × (–) = +
� Every integer on the right is greater than that of the left � (+) × (–) = –
� (–) × (+) = –

Rememberable Points Priority of Operator

� There is not any greatest or smallest integer B Brackets
� Zero is greater than every negative integer and less O Of
than every positive integer D Division

� 1 is the smallest positive integer M Multiplication
� –1 is the greatest negative integer A Addition
� Zero is neither positive integer nor negative integer S Subtraction