Question

Bài 1 : Thực hiện phép tính

a) ( -1/2) - ( -3/5) + ( -1/9) + 1/71 - ( -2/7) + 4/35 - 7/18

b) ( 3 - 1/4 +2/3) - ( 5 - 1/3 - 6/5 ) - (6 - 7/4 +3/2 )

Bài 2 : Thực hiện phép tính

a) 2/3 - 4 . ( 1/2 +3/4 )

b) ( -1/3 +5/6) .11 -7

c) ( -5/9) . 3/11 + ( -13/18) . 3/11

d) ( -2/3) . 3/11 + ( -16/9) . 3/11

CÁC BẠN CỐ GẮNG HỘ MK NHA :(((

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Answer 1

Bài 2:

a) \(\frac{2}{3}\) - 4 .(\(\frac{1}{2}\) + \(\frac{3}{4}\)) = \(\frac{2}{3}\) - 4 . \(\frac{5}{4}\)

= \(\frac{2}{3}\) - 5 = \(\frac{-13}{3}\)

b) (\(\frac{-1}{3}\) + \(\frac{5}{6}\)) . 11 - 7 = \(\frac{1}{2}\). 11 - 7

= \(\frac{11}{2}\)- 7 = \(\frac{-3}{2}\)

c) \(\frac{-5}{9}\). \(\frac{3}{11}\)+ (\(\frac{-13}{18}\)) . \(\frac{3}{11}\)= \(\frac{3}{11}\). (\(\frac{-5}{9}\)- \(\frac{13}{18}\))

= \(\frac{3}{11}\). (\(\frac{-23}{18}\))= \(\frac{-23}{66}\)

d) \(\frac{-2}{3}\) . \(\frac{3}{11}\)+ (\(\frac{-16}{9}\)) . \(\frac{3}{11}\)= \(\frac{3}{11}\). (\(\frac{-2}{3}\)- \(\frac{16}{9}\))

= \(\frac{3}{11}\). (\(\frac{-22}{9}\)) = \(\frac{-2}{3}\)

Bài 1:

a) =\(\frac{-1}{2}\)+ \(\frac{3}{5}\)- \(\frac{1}{9}\)+ \(\frac{1}{71}\) + \(\frac{2}{7}\) + \(\frac{4}{35}\)- \(\frac{7}{18}\)

= (\(\frac{-1}{2}\)- \(\frac{1}{9}\)- \(\frac{7}{18}\)) + ( \(\frac{3}{5}\)+ \(\frac{2}{7}\)+ \(\frac{4}{35}\)) + \(\frac{1}{71}\)

= -1 + 1 + \(\frac{1}{71}\)= \(\frac{1}{71}\)

b) = 3 - \(\frac{1}{4}\)+ \(\frac{2}{3}\)- 5 + \(\frac{1}{3}\)+ \(\frac{6}{5}\)- 6 + \(\frac{7}{4}\)- \(\frac{3}{2}\)

= (3 - 5 - 6) + (\(\frac{-1}{4}\)+ \(\frac{7}{4}\)- \(\frac{3}{2}\)) + (\(\frac{2}{3}\)+ \(\frac{1}{3}\)) + \(\frac{6}{5}\)

= -8 + 0 + 1 + \(\frac{6}{5}\)

= \(\frac{-29}{5}\)