\(\frac{13.8-13}{6-9}=\frac{13\left(8-1\right)}{-3}=\frac{13.7}{-3}=\frac{-91}{3}\)
Các câu hỏi tương tự
1 Tính
a) -8 + 19
b) (-17):(-3)
c) 4-(-13)
2 Tính
a) -9 - 13 -(-24) +11
b) 323 - 6[3 - 7.(-9)
c) (-3)5 : (-3)3 -9
d) (-8).16-13.8
3 Tìm x thuộc Z biết
a) -15:x=3
b) -3x +8 = -7
c) (x - 6)(7 - x)=0
tính nhanh: P = \(\frac{6}{7}.\frac{8}{13}+\frac{6}{9}.\frac{9}{7}-\frac{3}{13}.\frac{6}{7}\)
\(\frac{\frac{6}{7}-\frac{6}{9}+\frac{6}{11}-\frac{6}{13}}{\frac{8}{7}-\frac{8}{9}+\frac{8}{11}-\frac{8}{13}}\)
\(\frac{\frac{6}{7}-\frac{6}{9}+\frac{6}{11}-\frac{6}{13}}{\frac{8}{7}-\frac{8}{9}+\frac{8}{11}-\frac{8}{13}}\)Tính nha các bạn
Tính:
E=\(\frac{\frac{6}{7}-\frac{6}{9}+\frac{6}{11}-\frac{6}{13}}{\frac{8}{7}+\frac{8}{11}-\frac{8}{9}-\frac{8}{13}}\)
\(\frac{\frac{6}{7}-\frac{6}{9}+\frac{6}{11}-\frac{6}{13}}{\frac{8}{7}-\frac{8}{9}+\frac{8}{11}-\frac{8}{13}}\)
tính nhanh P =\(\frac{6}{7}\)*\(\frac{8}{13}+\frac{6}{9}\cdot\frac{9}{7}-\frac{3}{13}\cdot\frac{6}{7}\)
cách giải
Tinh nhanh
c) P = \(\frac{6}{7}.\frac{8}{13}-\frac{6}{9}.\frac{9}{7}+\frac{5}{13}.\frac{6}{7}\)
d) Q = \(\frac{-9}{25}.\frac{53}{3}-\left(\frac{3}{5}\right)^2.\frac{22}{3}\)
Tính nhanh:
\(M=\frac{17}{5}.\frac{-31}{125}.\frac{1}{2}.\frac{10}{17}.\frac{-1}{2^3}\)
\(P=\frac{6}{7}.\frac{8}{13}+\frac{6}{9}.\frac{9}{7}-\frac{3}{13}.\frac{6}{7}\)