Question

Oblicz :
3/4 : 3/10 - (-1 cała 1/6 ) :7/5
b) 2 √12 - 2√75 =

zad 2

(2 do 7 * 2 do -9) : 2 do -5


zad 3
( 9*10 do -11) : ( 5,5 * 10 do -9) =

Answer 1

3/4 : 3/10 - (- 1 1/6) : 7/5 = 3/4 * 10/3 + 1 1/6 : 7/5 = 10/4 + 7/6 * 5/7 = 10/4 + 5/6 = 30/12 + 10/12 = 40/12 = 3 4/12 = 3 1/3
b)
2√12 - 2√75 = 2√(4 * 3) - 2√(25 * 3) = 2√4 * √3 + 2√25 * √3 = 2 *2 * √3 + 2 *5 * √3 =
= 4√3 + 10√3 = 14√3
zad 2
(2⁷ * 2⁻⁹) : 2⁵ = 2⁷⁻⁹ : 2⁵ = 2⁻² : 2⁵ = 2⁻²⁻⁵ = 2⁻⁷
zad 3
(9 * 10⁻¹¹ : 5,5 * 10⁻⁹ = (9/5,5) * 10⁻²⁰ = ≈ 1,64 * 10⁻²⁰