Question

Bài 1: tính nhanh

a, \(\frac{6}{7}\)+\(\left(\frac{2}{11}-\frac{6}{7}\right)\)

b, \(\frac{15}{34}+\frac{7}{21}+\frac{9}{34}-1\frac{15}{17}+\frac{2}{3}\)

c, \(\frac{3}{7}.\frac{2}{9}+\frac{7}{9}.\frac{3}{7}\)

                                            Bài dễ ai nhanh tay tui tick cho nè ^^

Answer 1

dễ hỏi lm j

Answer 2

:)) Để kiếm k đó bạn ^^ Nhật Linh Nguyễn

Answer 3

a) = \(\frac{6}{7}\)+\(\frac{2}{11}\)-\(\frac{6}{7}\)

= \(\frac{2}{11}\)+(\(\frac{6}{7}\)-\(\frac{6}{7}\))

= \(\frac{2}{11}\)

b) = \(\frac{15}{34}\)+\(\frac{1}{3}\)+\(\frac{9}{34}\)-\(\frac{32}{17}\)+\(\frac{2}{3}\)

= ( \(\frac{15}{34}\)+ \(\frac{9}{34}\)) + ( \(\frac{1}{3}\)+ \(\frac{2}{3}\)) - \(\frac{32}{17}\)

= \(\frac{12}{17}\)+ 1 - \(\frac{32}{17}\)

= \(\frac{12}{17}\)+ \(\frac{17}{17}\)- \(\frac{32}{17}\)

= \(\frac{12+17-32}{17}\)

=\(\frac{-3}{17}\)

c) = \(\frac{3}{7}\)x ( \(\frac{2}{9}\)+ \(\frac{7}{9}\))

= \(\frac{3}{7}\)x 1

=\(\frac{3}{7}\)