oblicz jak najprostrzym sposobem :
a) 3/8x(-0,9)x(-16/3)x10
b) 5x(0,25)x0,2x(-4)
c) (2,5)x0,2x(-10)x2
d) (-6)x(-4/7)x2/5x(-7)x5/12
e) (-1 1/2)x0,06x(-2/3)x100
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najpierw ustalamy znak iloczynu i stosujemy przemiennosc mnozenia
a) 9*3/8*16/3=9*2=18
b)-0,25*4*5*0,2=1*1=-1
c) -2*2,5*2=- 5*2= -10
d) - 5/2*2/5*4=- 1*4= -4
e) 6*3/2*2/3=6*1=6