Oblicz wartość wyrażeń .
a) (-2,5): 1 2/3 - 1,4
b)2,6 - 1/4 :[2 - (-1,75)]
c)1 2/5 x (-1 3/7) + 1/3 : [1+6:(-18)]
d)[-2/3 - (-1,8):(-1 1/5) ] : (-1/27)
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A) (-25/10);5/3-14/10= (-25/10)*3/5-14/10=(-15/10)-1,4=(-1.5)-1,4=-2,9
B)26/10-1/4;[3.75]=26/10-1,4*100/375=26/10-1/15=78/30-2/30=76/30=2 16/30
C)7/5*(-10/7)+4/3;[1-1/3]=-2+4/3*3/2=-2+2=0
D)[-2/3+1,8;6/5];(-1/27)=4/30*5/6;(-1/27)=1/9*(-27)=-3