Question

[Hot Girl]

Tính nhanh

1/2-2/3+3/4-4/5+5/6-6/7-5/6+4/5-3/4

ai giúp mình với mk tick cho!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

[duy trâm nguyễn]

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

= \(\frac{1}{2}-\frac{2}{3}-0-0-0-\frac{6}{7}\)

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

=\(\frac{21}{42}-\frac{28}{42}-\frac{36}{42}\)

= \(\frac{-43}{42}\)

Answer 2

[công chúa hoa anh đào]

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