Question

[uyn]

1. a ) 3/5 + 2/15=         b) 4-2/3=             c)4/9 :3=
2. X x 3/4=       2 x X =3/5      X :5/7 =2     

MÌN ĐG CẦN GẮP NHA MÌ PẶN

Answer 1

[Hoàng Lâm]

\(a)\frac{3}{5}+\frac{2}{15}\)

\(=\frac{9}{15}+\frac{2}{15}\)

\(=\frac{11}{15}\)

\(b)4-\frac{2}{3}\)

\(=\frac{12-2}{3}\)

\(=\frac{10}{3}\)

\(=3\frac{1}{3}\)

\(c)X\times\frac{3}{4}=\frac{4}{9}:3\)

    \(X\times\frac{3}{4}=\frac{4}{27}\)

    \(X=\frac{4}{27}:\frac{3}{4}\)

    \(X=\frac{8}{81}\)

    \(2\times X=\frac{3}{5}\)

    \(X=\frac{3}{5}:2\)

    \(X=\frac{3}{10}\)

    \(X:\frac{5}{7}=2\)

    \(X=2\times\frac{5}{7}\)

    \(X=\frac{10}{7}\)