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A = \(\dfrac{18}{26}\) + (-\(\dfrac{5}{27}\)) + (-\(\dfrac{22}{86}\)) + \(\dfrac{12}{39}\) - \(\dfrac{32}{43}\)
A = \(\dfrac{9}{13}\) - \(\dfrac{5}{27}\) - \(\dfrac{11}{43}\) + \(\dfrac{4}{13}\) - \(\dfrac{32}{43}\)
A = (\(\dfrac{9}{13}\) + \(\dfrac{4}{13}\)) - (\(\dfrac{11}{43}\) + \(\dfrac{32}{43}\)) - \(\dfrac{5}{27}\)
A = \(\dfrac{13}{13}\) - \(\dfrac{43}{43}\) - \(\dfrac{5}{27}\)
A = 1 - 1 - \(\dfrac{5}{27}\)
A = 0 - \(\dfrac{5}{27}\)
A = - \(\dfrac{5}{27}\)
a) \(5.4^2-18:3^2=5.16-18:9=80-2=78\)
b) \(3^3.18-3^3.12=3^3.\left(18-12\right)=27.6=162\)
a)=36-9+17=27-17=10
b)9.125+81=1125+81=1206
c)512:16-25=32-25=7
d)27.81-25.9+3=2187-225+3=1965
k nha e
A = 18/26 + -5/27 + -22/86 + 12/39 + -32/43
A = 9/13 + -5/27 + -11/43 + 4/13 + -32/43
A = -5/27 + ( 9/13 + 4/13 ) + ( -11/43 + -32/43 )
A = -5/27 + 1 + ( -1)
A = -5/27 + 0
A = 0
B = -10/12 + 8/15 + -19/56 + 3/-18 + 28/60
B = -5/6 + 8/15 + -19/56 + -1/6 + 7/15
B = -19/56 + ( -5/6 + -1/6 ) + ( 8/15 + 7/15 )
B = -19/56 + ( -1 ) + 1
B = -19/56 + 0
B = 0
3. (-8) - (-15)
= (-24) - (-15)
= -9
(-2)^3 + 14 : (-7)
= (-2)^3 + (-2)
= (-8) + (-2)
= -10
c) 4. (12-27) - 3.(-18)
= 4. (-15) - 3.(-18)
= -60 - 3.(-18)
= -60 - 54
= -6
giúp mik với mn ơi , mik cần gấp , ai trả lời đúng mik k đúng cho nhé , thank mn nhìu
b) 3 3 . 18 - 3 3 . 12 = 27.18 -27.12 = 27.(18 – 12) = 27.6 = 162