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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 = - \(\dfrac{5}{27}\)
Thôi, để mk giải chi tiết cho, không lại bảo mk lười:
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=\(\left(\dfrac{9}{13}+\dfrac{4}{13}\right)+\left(\dfrac{-11}{43}+\dfrac{-32}{43}\right)+\dfrac{-5}{27}\)
A= 1+(-1)+\(\dfrac{-5}{27}\)
A=0+\(\dfrac{-5}{27}\)
A=\(\dfrac{-5}{27}\)
B=\(\dfrac{-10}{12}+\dfrac{8}{15}+\dfrac{-19}{56}+\dfrac{-3}{18}+\dfrac{28}{60}\)
B=\(\dfrac{-5}{6}+\dfrac{8}{15}+\dfrac{-19}{56}+\dfrac{-1}{6}+\dfrac{7}{15}\)
B=\(\left(\dfrac{-5}{6}+\dfrac{-1}{6}\right)+\left(\dfrac{8}{15}+\dfrac{7}{15}\right)+\dfrac{-19}{56}\)
B= -1+1+\(\dfrac{-19}{56}\)
B=0+\(\dfrac{-19}{56}\)
B=\(\dfrac{-19}{56}\)
Ôi mỏi quá! Chúc bạn học tốt !
hãy quy đồng các phân số sau
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
Thông cảm ...Vì không biết sử dụng phân số nên đành viết bằng dấu gạch chéo
tich ch to nhe to chuo duoc diem hoi dap
tich cho minh nhe lam on
A= -5/27 (tớ rút gọn luôn rồi)
B=-19/56 (tớ rút gọn luôn rồi)
A = 18/26 + -5/27 + -22/86 + 12/39 + -32/43
= 9/13 + -5/27 + -11/43 + 4/13 + -32/43
= (9/13 + 4/13) + (-11/43 + -32/43) + -5/27
= 13/13 + -43/43 + -5/27
= (1 + -1) + -5/27 = 0 + -5/17 = -5/27
B = -10/12 + 8/15 + -19/56 + 3/-18 + 28/60
= -5/6 + 8/15 + -19/56 + -1/6 + 7/15
= (-5/6 + -1/6) + (8/15 + 7/15) + -19/56
= -6/6 + 15/15 + -19/56
= (-1 + 1) + -19/56 = 0 + -19/56 = -19/56
A= 18/26+-5/27+-22/86+12/39+-32/43
=9/13+-5/27+-11/43+4/13+-32/43
=(9/13+4/13)+(-11/43+-32/43)+-5/27
=1+(-1)+-5/27
=(-1+1)+-5/27
=0+-5/27
=-5/27
B=-10/12+8/15+-19/56+3/-18+28/60
=-10/12+8/15+-19/56+-3/18+28/60
=-5/6+8/15+-19/56+-1/6+7/15
=(-5/6+-1/6)+(8/15+7/15)+-19/56
=(-1)+1+-19/56
=(-1+1)+-19/56
=0+-19/56
=-19/56
k cho tui vì điểm hỏi đáp đang âm điểm
A=-5/27
B=-19/56