Question

BARDZO PILNE!! PROSZĘ O POMOC!! MAM CZAS DO DZIŚ

Oblicz

1) 5* [ 0,6-3/5 : (-2)]²=
2) [ -6 : 0,9 + (-4/5): 2/3] * (1/2) ⁻²=
3) 2⁻³ * [0,8 - 3/4 : (- 0,6) ] =
4) ( √4/9 + 1 1/2) : [ ( 4 1/2)² - 18 1/6]=

:)

Answer 1

1) 5* [ 0,6-3/5 : (-2)]²=
5* [6/10 - 6/10 : (-2)]²= 5 * 0 = 0

2) [ -6 : 0,9 + (-4/5): 2/3] * (1/2) ⁻²=
[-60/9 - 6/5] * 4 =
[ -300/45 - 54/45] * 4 =
-354/45 * 4 = -1416/45 = -31 i 21/45


4) ( √4/9 + 1 1/2) : [ ( 4 1/2)² - 18 1/6]=
( √4/9 + 1 1/2) : [1681/4 - 181/6]=
√4/9 + 3/2 : 4681/12 = √4/9 + 18/4681

Answer 2

1) 5 × [0,6 - ⅗ : (-2)]² = 5 × [6/10 - ⅗ × (-½)]² =
= 5 × [6/10 + 3/10]² = 5 × (9/10)² = 5 × 81/100 = 81/20
2) [-6 : 0,9 + (-⅘) : ⅔] × (½)⁻² = [-6 : 9/10 + (-⅘) × 3/2] × 4 =
= [-6 × 10/9 + (-6/5)] × 4 = [-20/3 + (-6/5)] × 4 =
= [-6 i 2/3 + (-6/5)] × 4 = - 118/15 × 4 = - 472/15 = -31 7/15
3) 2⁻³ × [0,8 - ¾ : (-0,6)] = ⅛ × [0,8 - 0,75 : (-0,6)] =
= 0,125 × [0,8 + 1,25] = 0,125 × 2,05 = 0,25625
4) (√4/9 + 1½) : [(4½)² - 18 ⅙] = 13/6 : [81/4 - 18 ⅙] =
= 13/6 : [20 ¼ - 18 ⅙] = 13/6 : 25/12 = 26/25 = 1 1/25