@Holliwood#: @ TEAM_IQ_2000#:
Đáp án:
a) $\frac{111632}{11067}$
b) $\frac{9}{41}$
c) $\frac{61}{3}$
d) $\frac{3759}{248}$
Giải thích các bước giải:
a) 17$\frac{2}{31}$-($\frac{15}{17}$+ 6$\frac{2}{21}$)
= $\frac{529}{31}$-($\frac{15}{17}$+$\frac{128}{21}$)
= $\frac{529}{31}$-$\frac{2491}{357}$
= $\frac{111632}{110667}$
b) (31$\frac{6}{13}$+5$\frac{9}{41}$)-36$\frac{6}{13}$
= [(31+5)+($\frac{6}{14}$+$\frac{9}{41}$)]-$\frac{474}{13}$
= (36+$\frac{363}{533}$)-$\frac{474}{13}$
= $\frac{19551}{533}$-$\frac{474}{13}$
= $\frac{9}{41}$
c) 27$\frac{51}{59}$-(7$\frac{51}{59}$-$\frac{1}{3}$)
= $\frac{1644}{59}$-($\frac{464}{59}$-$\frac{1}{3}$)
= $\frac{1644}{59}$-$\frac{1333}{177}$
= $\frac{61}{3}$
d) (17$\frac{29}{31}$-3$\frac{7}{8}$)-(2$\frac{28}{31}$-4)
= ($\frac{556}{31}$-$\frac{31}{8}$)-($\frac{90}{31}$-4)
= $\frac{3487}{248}$-(-$\frac{34}{31}$)
= $\frac{3487}{248}$+$\frac{34}{31}$
= $\frac{3759}{248}$
Bn tham khảo nhé!!!!!!!!!!!!!!!
Xin clthn ạ!!!!!!!!!!!!!!
