Question

[Lâm Nguyệt Hy]

so sánh:

a,\(\dfrac{4}{9}vs\dfrac{13}{18}\) b,\(-\dfrac{15}{7}vs-\dfrac{6}{5}\) c,\(\dfrac{278}{37}vs\dfrac{287}{46}\) d,\(-\dfrac{157}{623}\)vs\(-\dfrac{47}{213}\)

Answer 1

[Nguyễn Lê Phước Thịnh]

a: 4/9=8/18<13/18

b: \(\dfrac{-15}{7}=\dfrac{-75}{35}\)

\(\dfrac{-6}{5}=\dfrac{-42}{35}\)

mà -75<-42

nên \(-\dfrac{15}{7}< -\dfrac{6}{5}\)

c: 37/278=1-241/278

46/287=1-241/287

mà 241/278>241/287

nên 37/278<46/287

=>278/37>286/47