Question

[Hà Hoàng]

Câu 1 thực hiện phép tính ( tính nhanh nếu có thể)

a. 3\(\frac{14}{19}\)+ \(\frac{13}{17}\)+\(\frac{35}{43}\)+ 6\(\frac{5}{19}\)+\(\frac{8}{43}\)

b.\(\frac{-5}{7}\)*\(\frac{2}{11}\)+\(\frac{-5}{7}\)*\(\frac{9}{11}\)+ 1\(\frac{5}{7}\)                                                   c.11\(\frac{3}{13}\)- (2\(\frac{4}{7}\)+5\(\frac{3}{13}\))

d.\(\frac{2}{7}\)* 5\(\frac{1}{4}\)-\(\frac{2}{7}\)* 3\(\frac{1}{4}\)

GIẢI HỘ MIK VS Ạ

Answer 1

[Member lỗi thời :>>]

\(3\frac{14}{19}+\frac{13}{17}+\frac{35}{43}+6\frac{5}{19}+\frac{8}{43}\)

\(=\left(3\frac{14}{19}+6\frac{5}{19}\right)+\left(\frac{35}{43}+\frac{8}{43}\right)+\frac{13}{17}\)

\(=10+1+\frac{13}{17}=11+\frac{13}{17}=11\frac{13}{17}\)

Answer 2

[Member lỗi thời :>>]

\(\frac{-5}{7}.\frac{2}{11}+\frac{-5}{7}.\frac{9}{11}+1\frac{5}{7}\)

\(=\frac{-5}{7}.\frac{2}{11}+\frac{-5}{7}.\frac{9}{11}+1+\frac{-5}{7}.\left(-1\right)\)

\(=\frac{-5}{7}\left(\frac{2}{11}+\frac{9}{11}-1\right)+1\)

\(=\frac{-5}{7}.0+1==0+1=1\)