Trắc nghệm Toán 6 bài 10 ( có đáp án ) : Phép nhân phân số và tính chất cơ bản

$\frac{a}{b}.\frac{c}{d}=\frac{a.c}{b.d}\left(b;d\ne 0\right)$

$\frac{a}{b}.\frac{c}{d}=\frac{a.d}{b.c}\left(b;c;d\ne 0\right)$

$\frac{a}{b}.0=1$

$\frac{a}{b}.1=0$

Tính chất giao hoán

Tính chất kết hợp

Tính chất nhân phân phối

Tất cả các tính chất trên

$\frac{a}{b}.\frac{c}{d}=\frac{c}{d}.\frac{a}{b}\left(b;d\ne 0\right)$

$\frac{a}{b}.1=1.\frac{a}{b}=\frac{a}{b}\left(b\ne 0\right)$

$\frac{a}{b}.\left(\frac{c}{d}+\frac{p}{q}\right)=\frac{a}{b}.\frac{c}{d}+\frac{a}{b}.\frac{p}{q}\left(b;d;q\ne 0\right)$

Tất cả các tính chất trên

$\frac{-1}{16}$

$\frac{-5}{32}$

$-2$

$\frac{-15}{32}$

$\frac{-21}{20}$

$\frac{21}{20}$

$\frac{-15}{20}$

$\frac{-5}{33}$

$\frac{-2}{27}$

$\frac{-4}{9}$

$\frac{-1}{18}$

$\frac{-3}{2}$

$\frac{9}{10}$

$\frac{-10}{9}$

$\frac{-9}{10}$

$\frac{10}{9}$

$\frac{-16}{8}$

$\frac{-13}{8}$

$\frac{-6}{16}$

$-\frac{3}{4}$

$\frac{-5}{2}$

$\frac{-1}{6}$

$\frac{5}{2}$

$-\frac{31}{4}$

${\left(\frac{-7}{6}\right)}^2=\frac{-49}{36}$

${\left(\frac{2}{3}\right)}^3=\frac{8}{9}$

${\left(\frac{2}{-3}\right)}^3=\frac{8}{-27}$

${\left(\frac{-2}{3}\right)}^4=\frac{-16}{81}$

${\left(\frac{4}{5}\right)}^2=\frac{16}{10}$

${\left(\frac{-3}{7}\right)}^2=-\frac{9}{49}$

${\left(\frac{1}{3}\right)}^3=\frac{1}{27}$

${\left(\frac{-2}{5}\right)}^3=\frac{8}{125}$

$\frac{2}{7}.\frac{14}{6}=\frac{2}{3}$

$25.\frac{-4}{15}=\frac{-20}{3}$

${\left(\frac{2}{-3}\right)}^2.\frac{9}{4}=1$

$\frac{-16}{25}.\left(\frac{25}{-24}\right)=-\frac{2}{3}$

$\frac{-3}{4}.\frac{-4}{5}=-\frac{3}{5}$

$21.\frac{6}{7}=18$

${\left(\frac{-1}{2}\right)}^2.\frac{16}{5}=\frac{4}{5}$

$\frac{19}{28}.\frac{56}{57}=\frac{2}{3}$

x∈{−3;−2;−1}

x∈{−4;−3;−2;−1}

x∈{−3;−2}

x∈{−3;−2;−1;0}

x∈{7;8;9;10;11;12}

x∈{7;8;9;10;11}

x∈{6;12}

x∈{6;7;8;9}

$\frac{-15}{28}$

$\frac{-9}{28}$

$\frac{-5}{8}$

$\frac{-7}{8}$

$\frac{19}{9}$

$\frac{-9}{2}$

$\frac{-5}{18}$

$\frac{-17}{8}$

1

0

2

3

1

0

2

3

$x=\frac{-1}{27}$

$x=\frac{-1}{18}$

$x=\frac{-1}{9}$

$x=\frac{-1}{45}$

$\frac{-5}{3}$

$\frac{-3}{5}$

$\frac{-1}{3}$

$\frac{-1}{5}$