zad4 str.27
a). 1 7/8 x (-6) tego nie trzeba ;d
b). -1 1/5 x 2 1/2
c). -1 3/4 : 8
d). 1 1/3 x 0,5
e). 5,25 : (-1 1/2)
f). -1,5 : (-2 1/3)
g). -1 3/4 + 7 1/5
h). -2 3/8 - 1/12
i). -13,1 - 2,5
j). 17,21 - 20,03
k). -0,82 x (-0,3)
l). -0,75 - (1 2/3)
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a). 1 7/8 x (-6) = 15/8 x (-6) = -90/8 = -11 2/8
b). -1 1/5 x 2 1/2 = -6/5 x 5/2 [skracamy 5] = -6/2 = -3
c). -1 3/4 : 8 = -7/4 x 1/8 = -7/32
d). 1 1/3 x 0,5 = 4/3 x 1/2 = 4/6 = 2/3
e). 5,25 : (-1 1/2) = 5,25:(-1,5) = -3,5
f). -1,5 : (-2 1/3) = -3/2 : (-7/3) = -3/2 * (-3/7) = 9/14
g). -1 3/4 + 7 1/5 = -7/4+36/5 = -35/20+144/20 = 109/20 = 5 9/20
h). -2 3/8 - 1/12 = -19/8-1/12 = -57/24-2/24 = -59/24 = -2 11/24
i). -13,1 - 2,5 = -15,6
j). 17,21 - 20,03 = 2,82
k). -0,82 x (-0,3) = 0,246
l). -0,75 - (1 2/3) = -3/4 - 5/3 = -9/12-20/12 = -29/12 = -2 5/12
a)
1 7/8*(-6)=15/8*(-6) =-90/8 =-11 2/8
b)
-1 1/5*2 1/2 =-6/5*5/2 =-6/2 =-3
c)
-1 3/4 : 8 =-7/4*1/8 =-7/32
d)
1 1/3*0,5 = 4/3*1/2 =4/6 =2/3
e)
5,25 : (-1 1/2) =5,25:(-1,5) =-3,5
f)
-1,5:(-2 1/3) =-3/2:(-7/3)=-3/2*(-3/7) =9/14
g)
-1 3/4+7 1/5 =-7/4+36/5 =-35/20+144/20 =109/20 =5 9/20
h)
-2 3/8-1/12 =-19/8-1/12=-57/24-2/24=-59/24=-2 11/24
i)
-13,1-2,5 =-15,6
j)
17,21-20,03=2,82
k)
-0,82*(-0,3)=0,246
l)
-0,75-(1 2/3)=-3/4-5/3=-9/12-20/12=-29/12=-2 5/12