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We know that multiplicatio is commut...

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

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Knowledge Check

  • Write commutative property of multiplication using variables x and y :

    A
    xy = yx
    B
    x + y = y + x
    C
    x + y
    D
    xy

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    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 ?

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    Subtraction of integers is not commutative.

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