Question

1.Thực hiện phép tính:

a) 9.(\(\frac{-1}{3}\))\(^{^{ }3}\) + \(\frac{1}{3}\)

b) \(\frac{61}{4}\) : (\(\frac{-5}{7}\)) - \(\frac{101}{4}\) : (\(\frac{-5}{7}\)

Answer 1

a ) \(9.\left(\frac{-1}{3}\right)^3+\frac{1}{3}=9.\frac{-1}{27}+\frac{1}{3}=\frac{-1}{3}+\frac{1}{3}=0\)

b ) \(\frac{61}{4}:\left(\frac{-5}{7}\right)-\frac{101}{4}:\left(\frac{-5}{4}\right)=\left(\frac{61}{4}-\frac{101}{4}\right)+\frac{5}{7}=-10+\frac{5}{7}=\frac{-65}{7}\)

Nhớ tik cho mk nha

Answer 2

a) = 9.(-1/27) + 1/3

= -1/3 + 1/3

=0

b) câu này mk tính nhanh

= (61/4 - 101/4) : (-5/7)

= -10 : (-5/7)

=7/2

nhớ tích mk nha