Tính a) -6/18 + 18/27
Giải thích
a) −618+1827=−13+23=13.
b) 2,5−−69=52+23=156+46=196.
c) –0,32.(–0,875) −0,32.−0,875=−32100.−8751000=−825.−78=−8.−725.8=725.
d) −5:215=−5:115=−5.511=−2511.
a) −618+1827=−13+23=13.
b) 2,5−−69=52+23=156+46=196.
c) –0,32.(–0,875) −0,32.−0,875=−32100.−8751000=−825.−78=−8.−725.8=725.
d) −5:215=−5:115=−5.511=−2511.