Check if (a) 25×(-21)=(-25)×21 (b)(-23)×20=23×(-20) write 5 more such examples
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(-30)×25=(-25)×30;
(-40)×36=(-36)×40;
(-57)×45=(-45)×57;
(-20)×40=(-40)×20;
(-15)×31=(-31)×15
these are correct
(-40)×36=(-36)×40;
(-57)×45=(-45)×57;
(-20)×40=(-40)×20;
(-15)×31=(-31)×15
these are correct
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