Question

Va rog urgent!!Dau coroana.

Answer 1

^=la putere
/=fracție
6)(2-5/3+1/2)÷(5/3-8/5)-(1+3/4-1/2)÷5/4
5/6:1/15-5/4÷5/4
5/6×15-1
5/2×5-1
25/2-1=23/2
7)1/2+[1.25-(1.25-0.6-0.5)-0.4]
1/2+(1.25-0.15-0.4)
1/2+0.7
1/2+7/10=6/5
8)[(21/4+3×9/5)÷27/10+7.2×5/4]9/5
[(21/4+27/5)×10/27+36/5×5/4]5/9
(213/20 ×10/27+9)×5/9
(71/18+9)×5/9
233/18×5/9=1165/162
9)[(4.5-3.25)^2]÷(9/5-3/10)
[(5/4)^2-1/10]÷3/2
(25/16-1/16)÷3/2
3/2÷3/2=1
10)(3/2+2/5)×5/2-[(1/4+2/3)×3/4-3/4×1/4]×1/3
19/10×5/2-(11/12×3/4-3/16)×1/3
19/4-1/2×1/3
19/4-1/6=55/12
11)[(1/3+3/20+1/10)×6/50+(1.66+0.3-1.22)×1/3]÷11/10
(7/12×6/50+0.74×1/3)×11/10
(7/2×1/50+37/50×1/3)×10/11
(7/100+37/150)×10/11
19/60×10/11
19/6×1/11=19/66
12)3/2-{(1/5)^2×10+[(1/2)^3×1/5+2/3-(19/10-5/4)]}
2/3-[1/25×10+(1/8×1/5+2/3-13/20)]
2/3[1/5×2+(1/40+2/3-13/20)]
2/3(2/51/24)
2/3-53/120=9/90.