1.Wykonaj działania:
a)-4 x (2 1/8)
b)-3 1/7 : 11=
c) 2 1/4 : (-1 1/2) =
d)-1,21+5,1=
e)-3,24 x (0,2)=
f)0,2 : (-0,4)=
g)2 3/4 x (-0,5)=
h)-2,3-1/3 =
i)-3,75:(-1 1/4) =
j) 1/3 :(-0,7)=
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a)-4 x (2 1/8)= -4 *17/8= -68/8= - 8,5
b)-3 1/7 : 11= - 22/7:11= - 22/7* 1/11= - 27/77
c) 2 1/4 : (-1 1/2) = 9/4 : (-3/2)= 9/4 * (-2/3)= 3/2 *(- 1/1)= - 3/2
d)-1,21+5,1= 3,89
e)-3,24 x (0,2)= = -0648
f)0,2 : (-0,4)= - 0,5
g)2 3/4 x (-0,5)= 11/4 * (-5/10)= - 55/40= - 1 15/40= -1 3/8= -1,375
h)-2,3-1/3 = -2 3/10 - 1/3= - 23/10 - 1/3= -69/30 - 10/30= - 79/30= - 2 19/30
i)-3,75:(-1 1/4) =- 3,75: (-1,25)= 3
j) 1/3 :(-0,7)= 1/3 : (- 7/10)= 1/3 * ( - 10/7)= - 10/21