=> Chọn B

My brother and I wachted firework display.

Đổi 1 giờ = 60 phút

1,8 giờ = 1,8 x 60 = 108 phút

Đổi 108 phút = 1 giờ 48 phút

điền từ play nhé 

My brother and I watch firework display at Tet

A\(\frac{1}{4}+\frac{2}{3}=\frac{3}{12}+\frac{8}{12}=\frac{11}{12}\)

B\(\frac{2}{7}+\frac{2}{3}=\frac{6}{21}+\frac{14}{21}=\frac{20}{21}\)

C\(\frac{2}{5}+\frac{1}{4}=\frac{8}{20}+\frac{5}{20}=\frac{13}{20}\)

D\(\frac{1}{2}+\frac{1}{3}=\frac{3}{6}+\frac{2}{6}=\frac{5}{6}\)

E\(\frac{1}{3}+\frac{3}{5}=\frac{5}{15}+\frac{9}{15}=\frac{14}{15}\)

G\(\frac{4}{5}+\frac{1}{2}=\frac{8}{10}+\frac{5}{10}=\frac{13}{10}\)

a, 1/4 + 2/3 = 2/12 + 8/12 = 10/12 = 5/6
b, 2/7 +2/3 = 6/21 + 14/21 = 20/21
c, 2/5 + 1/4 = 8/20 + 5/20 = 13/20
d, 1/2 + 1/3 = 3/6 + 2/6 = 5/6
e, 1/3 + 3/5 = 5/15 + 9/15 =14/15
g, 4/5 + 1/2 = 8/10 + 5/10 = 13/10

mik ấn nhầm toán lớp 4 á chứ đây là toán lớp 5 nha

1050 bạn ạ

420 : 2/5 = 1050 

HT

- Let's go to the pharmacy

- I want to buy some medicine.

Let's go to the pharmacy

I want to buy some medicine

\(\dfrac{1}{6}-\dfrac{1}{7}+\dfrac{1}{7}-\dfrac{1}{8}+...+\dfrac{1}{10}-\dfrac{1}{11}=\dfrac{1}{6}-\dfrac{1}{11}=\dfrac{5}{66}\)