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=3/8*(-9/10)*10/1=-27/8
b. 5 * ( - 0,25 ) * 0,2 * ( -0,4) =5/1*(-25/100)*2/10*(-4/10)=-25/20*(-2/5)=5/10=1/2
c. ( - 2,5 ) * 0,2 8 ( -10) * 2 =-25/10*28/100*(-20)=14
d. ( -6) * ( - 4/7 ) < cztery siódme > * 2/5 < dwie piąte > * ( - 7) * 5/ 12 < pięc dwunastych=24/7*(-14/5)*5/12=-4
e.( - 1 i 1/2) < jeden i jedna druga > * 0,06 * ( - 2/3 ) < dwie trzecie > * 100 =(-3/2)*6/100*(-200/3)=9/100*200/3=6