Đáp án:
$d=43/37$ × $23/15-43/37$ × $8/15+31/37$
$= 43/37$ x $23/15+43/37$ x $(-8/15)+31/37$
$= 43/37(23/15-8/15)+31/37$
$= 43/37.1+31/37$
$= 2$
$E= -5/24$ × $9/11- 5/24$ × $2/11+7/12$
$= -5/24(9/11+2/11)+7/12$
$= -5/24.1+7/12$
$= 3/8$
$a) 3/7– -11/14- 7/3×6/7$
$= 3/7--11/14-2$
$= 3/7+11/14-2$
$= -11/14$
$b) 6/5:3/2+ -2/3×9/14$
$= 4/5-3/7$
$= 13/35$
BẠN THAM KHẢO NHA!!!