a) 16/3 - (17 - 2/3)
= 16/3 - 17 + 2/3
= (16/3 + 2/3) - 17
= 6 - 17
= -11 (lớp 4 chưa học số âm em nhé. Xem lại đề)
b) 5/4 - (9/8 + 1/16)
= 20/16 - (18/16 + 1/16)
= 20/16 - 19/16
= 1/16
\(a)\dfrac{16}{3}-\left(17-\dfrac{2}{3}\right)\\ =\dfrac{16}{3}-\left(\dfrac{51}{3}-\dfrac{2}{3}\right)\\ =\dfrac{16}{3}-\dfrac{49}{3}\\ =-\dfrac{33}{3}=-11\\ b)\dfrac{5}{4}-\left(\dfrac{9}{8}+\dfrac{1}{16}\right)\\ =\dfrac{5}{4}-\left(\dfrac{18}{16}+\dfrac{1}{16}\right)\\ =\dfrac{5}{4}-\dfrac{19}{16}\\ =\dfrac{20}{16}-\dfrac{19}{16}\\ =\dfrac{1}{16}.\)