Question

[người khổng lồ xanh]

1.Rút gọn phân số

a. \(\frac{5.7}{14.3}\)                             c. \(\frac{10.63}{15.21}\)

b. \(\frac{3.55}{22.9}\)                             d. \(\frac{3.11.13}{26.15}\)

2. Rút gọn 

a.\(\frac{7.29+7.14}{43.5-43.11}\)                           b. \(\frac{19.15-7.14}{38}\)                       c. \(\frac{53.19-19.2}{7-60}\)                  d. \(\frac{120}{24.13-24.2}\)

Answer 1

[✫¸.•°*”˜˜”*°•✫ Ṱђầภ Ḉђết ✫•°*”˜˜”*°...]

Bài làm

1.

a) \(\frac{5.7}{14.3}=\frac{5.7}{2.7.3}=\frac{5}{6}\)

b) \(\frac{3.55}{22.9}=\frac{3.5.11}{2.11.3.3}=\frac{5}{6}\)

c) \(\frac{10.63}{15.21}=\frac{2.5.7.3.3}{3.5.7.3}=2\)

d) \(\frac{3.11.13}{26.15}=\frac{3.11.13}{2.13.3.5}=\frac{11}{10}\)

2.

a) \(\frac{7.29+7.14}{43.5-43.11}=\frac{7\left(29+14\right)}{43\left(5-11\right)}=\frac{7.43}{43.-6}=-\frac{7}{6}\)

b) \(\frac{19.15-7.14}{38}=\frac{285-98}{38}=\frac{187}{38}\)

c) \(\frac{53.19-19.2}{7-60}=\frac{19\left(53-2\right)}{7-60}=\frac{19.51}{-53}=-\frac{969}{53}\)

d) \(\frac{120}{24.13-24.2}=\frac{120}{24\left(13-2\right)}=\frac{24.5}{24.11}=\frac{5}{11}\)