а)
3/10-2/15=9/30-4/30=5/30=1/6
б)
2,4*(-1 1/3)=24/10*(-4/3)=-3,2
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а)
3/10-2/15=9/30-4/30=5/30=1/6
б)
2,4*(-1 1/3)=24/10*(-4/3)=-3,2