Question

Thực hiện các phép tính sau ( một cách hợp lí ) tung buoc

d) \(\dfrac{-2}{7}\) - (\(\dfrac{3}{11}\) - \(\dfrac{2}{7}\))

e) (2\(\dfrac{3}{7}\) + 1\(\dfrac{4}{7}\)) - \(\dfrac{17}{7}\)

f) \(\dfrac{-2}{3}\) . \(\dfrac{4}{5}\) + \(\dfrac{1}{5}\) : \(\dfrac{9}{11}\)

h) (-6,2 : 2 + 3,7) : 0,2

Answer 1

d: =-2/7-3/11+2/7=-3/11

e: =2+3/7+1+4/7-17/7

=4-17/7=11/7

f: =-2/3*4/5+1/5*11/9

=-8/15+11/45

=-24/45+11/45=-13/45

h: =(-3,1+3,7):0,2=0,6:0,2=3