Thực hiện phép tính a) -5/7 + 7/13 + -9/17 + 2/-7 + 6/13 b) 29 4/7
Giải thích
a) −57+713+−917+2−7+613=−57+−27+713+613+−917=−1+1+−917=−917
b) 29411−3713+25411=29411−25411−3713=4−3713=31313−3713=613
a) −57+713+−917+2−7+613=−57+−27+713+613+−917=−1+1+−917=−917
b) 29411−3713+25411=29411−25411−3713=4−3713=31313−3713=613