Question

1.Oblicz:
a) [3+2*(4*1-2)] * [18-(2*4-7*1)]
b) 4/5 - (⅔ * 4⅛ - 1⅞ * ⅖) : 2
c) -⅔ - 1,6 * ¹⁵/₄² - (-2)³/8 : 2-³ + 5(√3 + 2)(√3 -2)

Bardzo bym prosila o poprawne rozwiazanie jeszcze dzis

Answer 1

a) [3+2*(4*1-2)] * [18-(2*4-7*1)]=

=[3+2*(4-2)]*[18-(8-7)]=

=[3+2*2]*[18-1]=

=7*17=

=119

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b) 4/5 - (⅔ * 4⅛ - 1⅞ * ⅖) : 2=

=4/5 - (2/3 * 33/8 - 15/8 * 2/5) * 1/2=

=4/5 - (11/4 - 3/4) * 1/2=

=4/5 - 8/4 * 1/2=

=4/5 - 1=

=-1/5

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c) -⅔ - 1,6 * ¹⁵/₄² - (-2)³/8 : 2-³ + 5(√3 + 2)(√3 -2)=

=-2/3 - 8/5 * 15/16 - (-8)/8 * 8 + 15-20=

=-2/3 - 3/2 + 8 -5=

=-4/6 -9/6 +3=

=-13/6 + 18/6=

=5/6

Answer 2

1.Oblicz:
a) [3+2*(4*1-2)] * [18-(2*4-7*1)] = [3+2*(4-2)] *[18-(8-7)] =

   = [3+2*2] * [18-1] = [3+4]*17 = 7*17 = 119

b) 4/5 - (⅔ * 4⅛ - 1⅞ * ⅖) : 2 =

    = 4/5 - (2/3 *33/8 - 15/8 * 2/5)*1/2 =

    = 4/5 - ( 11/4 - 3/4)*1/2 =

    = 4/5 - 8/4 *1/2 = 4/5 - 2*1/2 = 4/5 - 1 = 4/5 - 5/5 = -1/5

c) -⅔ - 1,6 * ¹⁵/₄² - (-2)³/8 : 2-³ + 5(√3 + 2)(√3 -2) =

    = -2/3 - 16/10 * 15/16 +8/8 : 1/8 + 5(3-4) =

    = -2/3 - 3/2 + 1 *8 + 5*(-1)=

    = -2/3 - 3/2 + 8 - 5 = -4/6 - 9/6 + 8-5 = -13/6 + 3 = -2  1/6 + 3 = 5/6