Oblicz: a) (3/4 - 3/16) : 0,25 - (2 - 2/3) 2 ( do potegi drugiej)
b) 12,4-0,2*3+2*(3-0,2)
c) 2/5 * (3,8 - 2 * 0,15) - 1/2 * 0,2
d) 4 * (1-(1/2+1/3)) - 2/27 : 1/2
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2/5 *(3,8 - 0,3) -0,24 = 0,4*(3,8 - 0,3) -0,24 = 1,52 - 0,12 -0,24 = 1,4 - 0,24 = 1,16b a)12,4 - 0,2 x 3 + 2 x ( 3-0,2) = 12,4 -12,4 - 0,2 x 3 + 2 x 2,8 = 12,4 - 0,6 + 5,6 = 11,8 +5,6 = 17,4
a) (3/4 - 3/16) : 0,25 - (2 - 2/3)²=
(12/16-3/16):0,25-(4-2*2*2/3+4/9)=
9/16:1/4-(4-8/3+4/9)=
9/16*4/1-(36/9-24/9+4/9)=
9/4-21/9 =
81/36-84/36=
=-3/36
=-1/12
b) 12,4-0,2*3+2*(3-0,2)=
12,4-0,6+2*2,8 =
12,4-0,6+5,6=
17,4
c) 2/5 * (3,8 - 2 * 0,15) - 1/2 * 0,2=
0,4*(3,8-0,3)-0,5*0,2=
0,4*3,5-0,1=
1,4-0,1=
1,3
d) 4 * (1-(1/2+1/3)) - 2/27 : 1/2=
4*(1-(3/6+2/6))-2/27 * 2/1=
4*(1-5/6)-4/27=
4*1/6-4/27=
2/3-4/27=
54/81-12/81=
42/81=
14/27
Pozdrawiam :-)