1.Oblicz jak najprostszym sposobem.
a)trzy ósme *(-0,9)*(-szesnascie trzecich)*10=
b)5*(-0,25)*0,2*(-4)=
c) (-6)*(-cztery siodme)*dwie piate*(-7)*piec dwonastych=
d)(-2,5)*0,2*(-10)*2=
e)(-jeden caly i jedna droga)*0,06*(-dwie trzecie)*100=
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x to razy
np; 3/8 czyli trzy ósme
np; 12/7 czyli dwanascie siodmych
a) = 3/8 x (-9/10) x (-16/3) x 10/1 = 432/240 x 10/1 = 4320/240 = 18
b) = (-0,25) x (-4) = 1
c) = (-6/1) x (-4/7) x 2/5 x (-7/1) x 5/12 = 24/7 x 2/5 x (-7/12) x 5/12 = (-1680/240) = -4
d) = (-0,5) x (-10) x 2 = 10
e) = (-3/2) x 6/100 x (-2/3) x 100 = (-18/200) x (-2/3) x 100 = (-36/600) x 100/1 = (-36/6) = - 6