We know that multiplicatio is commutative for whole numbers : Can we say multiplication is also commutative for integers ?

Matrix multiplication is commutative .

Find if subtraction is commutative for the whole numbers 4234 and 2876.

The identity for the multiplication of whole numbers is

We know that 3+5=5+3=8 that is the whole numbers can be added in any order . In other words , addition is commutative for whole numbers Can we say the same fot integers also ? We have 5+(-6)=(-6)+5 Are the following equal ? (i) (-8)+(-9)and(-9)+(-8) (ii) (-23)+32and32+(-23) (iii) (-45)+0and0+(-45) Try this with five other pairs of inegers .Do you find any pairs of intergers for which the sums are different when the order is changed ?

Every Whole number Integer ?

Subtraction is not commutative for whole numbers. Use at least three different pairs of numbers to verify it.

Every Integer is Whole number?

When do we say that work is done ?