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b)4×(-2 5/12)=-25/3=-8 i 1/3 ( skracasz 4 i 12)
c)6×(-1 1/10)×(-2 4/8)=6*(-11/10)*(-20/8)=165/2=82 i 1/2
zamieniasz na ulamki niewlasciwe i skracasz na krzyz
d)-3 1/4×8/13×(-2 1/3)=-13/4*8/13*(-7/3)=14/3=4 i 2/3
e)2,05×(-0,8)=-1,64
f)-4,18×(-7,3)=30,514
g)-6,2×0,007=-0,0434
h)1 1/3×(-0,8)=4/3*(-8/10)=-24/30
i)-1,3×(-8/12)=-13/10*(-8/12)=13/15
j)-2,4×1 1/6=-24/10*7/6=-14/5=-2 i 4/5
k)-2 1/2×(1 1/4)×0,5= -5/2*5/4*1/2=-25/16=-1 i 9/16