Question

Matematyka poznać, zrozumieć klasa 1.

Zadanie 4/37

a)(-4 3/5 + ( 5 - 1/5 x 6)) : 2 +3 : (-1.5 ) +3 1/4 : (- 0,13 )

b)(-0,4) x (0,4) : (- 4/25 ) + 0,75 : 9/16 + (-1) x (-1) - (-2) x (-2) x (-2)

c)(3/4 - 0.25 ) x (3/4 - 0,25) x 2 + (3/5 - 0.4 ) x (3/5 - 0.4 ) x (-5) + (-5) x (-5)

tam gdzie pisałem np (-2) x (-2) x (-2) to jest (-2) do potęgi 3

Answer 1

A)
(-4 3/5 + ( 5 - 1/5 x 6)) : 2 +3 : (-1.5) +3 1/4 : (- 0,13) =
(-4 3/5 + (5 - 1 1/5)) * 1/2 + 3 : (- 15/10) + 13/4 : (-13/100) =
(-4 3/5 + 3 4/5) * 1/2 + 3 * (- 10/15) + 13/4 * ( - 100/13) =
(- 4/5) * 1/2 - 2 - 25 = - 2/5 - 27 = - 27 2/5

b)
(-0,4) x (0,4) : (- 4/25 ) + 0,75 : 9/16 + (-1) x (-1) - (-2) x (-2) x (-2) =
(- 0,16) : (- 0,16) + 75/100 * 16/9 + 1 - (-8) = 1 + 4/3 +9 = 11 1/3

c)
(3/4 - 0.25 ) x (3/4 - 0,25) x 2 + (3/5 - 0.4 ) x (3/5 - 0.4 ) x (-5) + (-5) x (-5) =
(3/4 - 1/4) * (3/4 - 1/4) *2 + (3/5 - 2/5) * (3/5 - 2/5) * ( -5) +25 =
1/2 * 1/2 * 2 + 1/5 * 1/5 *(-5) + 25=
1/2 -1/5 +25 = 5/10 - 2/10 +25 = 25,3