Mnożenie i dzielenie liczb wymiernych.
1. Oblicz.
a) (-3) x 2 x (-1) x (-2) =
b) -10 x (-20) x (-3) x (-4) =
c) (-1) x 2 x (-1) x 2 x (-1) x 2 =
2. Oblicz, pamiętając o kolejności wykonywania działań.
a) (-2) x 6 + 5 x (-3) =
b) 6 x (-2) : 12 x (-2) =
c) (-42) : (-7) x 6 =
d) -8 x 6+4 xx (-14) =
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zadanie 1.
a) (-3) x 2 x (-1) x (-2) = -12
b) -10 x (-20) x (-3) x (-4) = 2400
c) (-1) x 2 x (-1) x 2 x (-1) x 2 = -8
zadanie 2.
a) (-2) x 6 + 5 x (-3) =-27
b) 6 x (-2) : 12 x (-2) = 2
c) (-42) : (-7) x 6 = 36
d) -8 x 6+4 xx (-14) = -104