Free Printable PHÉP CHIA PHÂN SỐ LỚP 4 TH THUẬN KIỀU Q12

1.

\frac{\text{2}}{\text{3}}\ ;\ \frac{\text{4}}{\text{7}};\frac{\text{3}}{\text{5}}\ ;\ \frac{\text{9}}{\text{4}};\frac{\text{10}}{\text{7}}\

Em hãy chọn dãy phân số đảo ngược của các phân số trên.

a)

$\frac{\text{2}}{\text{3}}\ ;\ \frac{\text{7}}{\text{4}};\frac{\text{3}}{\text{5}}\ ;\ \frac{\text{9}}{\text{4}};\frac{\text{10}}{\text{7}}\$

b)

$\frac{\text{3}}{\text{2}}\ ;\ \frac{\text{7}}{\text{4}};\frac{\text{5}}{\text{3}}\ ;\ \frac{\text{4}}{\text{9}};\frac{\text{7}}{\text{10}}\$

c)

$\frac{\text{3}}{\text{2}}\ ;\ \frac{\text{7}}{\text{4}};\frac{\text{3}}{\text{5}}\ ;\ \frac{\text{4}}{\text{9}};\frac{\text{7}}{\text{10}}\$

d)

$\frac{\text{3}}{\text{2}}\ ;\ \frac{\text{4}}{\text{7}};\frac{\text{5}}{\text{3}}\ ;\ \frac{\text{9}}{\text{4}};\frac{\text{7}}{\text{10}}\$

2.

Em hãy chọn cách tính đúng phép tính $\frac{3}{7}:\frac{5}{8}$

a)

$\frac{3}{7}:\frac{5}{8}=\ \frac{3}{7}x\frac{5}{8}=\frac{15}{56}$

b)

$\frac{3}{7}:\frac{5}{8}=\ \frac{3}{7}x\frac{8}{5}=\frac{24}{35}$

c)

$\frac{3}{7}:\frac{5}{8}=\ \frac{3}{7}x\frac{8}{5}=\frac{18}{35}$

d)

$\frac{3}{7}:\frac{5}{8}=\ \frac{3\ x\ 5\ }{7\ x\ 8}=\frac{15}{56}$

3.

Em hãy chọn cách tính đúng phép tính $\frac{8}{7}\ :\ \frac{3}{4}$

a)

$\frac{8}{7}\ :\ \frac{3}{4}\ =\ \frac{8}{7}\ :\ \frac{3}{4}\ =\frac{24}{28}\$

b)

$\frac{8}{7}\ :\ \frac{3}{4}\ =\ \frac{8}{7}\ x\ \frac{3}{4}\ =\frac{24}{28}$

c)

$\frac{8}{7}\ :\ \frac{3}{4}\ =\ \frac{8}{7}\ x\ \frac{4}{3}\ =\frac{32}{21}$

d)

$\frac{8}{7}\ :\ \frac{3}{4}\ =\ \frac{8\ x4\ }{7\ x3\ }\ =\frac{32}{21}$

4.

Em hãy chọn cách tính đúng phép tính $\frac{1}{3}\ :\ \frac{1}{2}$

a)

$\frac{1}{3}\ :\ \frac{1}{2}=\frac{1}{3}\ x\ \frac{2}{1}=\frac{2}{3}\$

b)

$\frac{1}{3}\ :\ \frac{1}{2}=\frac{1}{3}\ x\ \frac{2}{1}=\frac{3}{4}\$

c)

$\frac{1}{3}\ :\ \frac{1}{2}=\frac{1}{3}\ x\ \frac{2}{1}=\frac{3}{3}\$

d)

$\frac{1}{3}\ :\ \frac{1}{2}=\frac{1}{3}\ x\ \frac{1}{2}=\frac{1}{6}\$

5.

Em hãy chọn cách tính đúng phép tính $\frac{2}{3}\ x\ \frac{5}{7}\$

a)

$\frac{2}{3}\ x\ \frac{5}{7}\ =\ \frac{10}{21}\$

b)

$\frac{2}{3}\ x\ \frac{5}{7}\ =\ \frac{2\ x\ 5\ }{3\ x\ 7\ }=\ \frac{10}{21}$

c)

$\frac{2}{3}\ x\ \frac{5}{7}\ =\ \frac{2\ x\ 7\ }{3\ x\ 5}=\ \frac{14}{15}$

d)

$\frac{2}{3}\ x\ \frac{5}{7}\ =\ \frac{3\ x\ 5\ }{2\ x\ 7}=\ \frac{15}{14}$

6.

Em hãy chọn cách tính đúng phép tính $\frac{10}{21}\ :\ \frac{5}{7}$

a)

$\frac{10}{21}\ :\ \frac{5}{7}=\frac{10}{21}\ :\ \frac{5}{7}=\frac{2}{3}\$

b)

$\frac{10}{21}\ :\ \frac{5}{7}=\frac{10}{21}\ x\ \frac{5}{7}=\frac{50}{147}\$

c)

$\frac{10}{21}\ :\ \frac{5}{7}=\frac{10}{21}\ x\ \frac{7}{5}=\frac{70}{105}\ =\frac{2}{3}\$

d)

$\frac{10}{21}\ :\ \frac{5}{7}=\frac{21}{10}\ x\ \frac{5}{7}=\frac{105}{70}\ =\ \frac{3}{2}$

7.

Em hãy chọn cách tính đúng phép tính $\frac{10}{21}\ :\ \frac{2}{3}$

a)

$\frac{10}{21}\ :\ \frac{2}{3}\ =\ \frac{5}{7}$

b)

$\frac{10}{21}\ :\ \frac{2}{3}\ =\frac{10}{21}\ x\ \frac{3}{2}\ =\ \frac{30}{42}\ =\frac{5}{7}$

c)

$\frac{10}{21}\ :\ \frac{2}{3}\ =\frac{10}{21}\ x\ \frac{3}{2}\ =\ \frac{30}{42}\$

d)

$\frac{10}{21}\ :\ \frac{2}{3}\ =\frac{10}{21}\ x\ \frac{2}{3}\ =\ \frac{20}{63}\$

8.

Em hãy chọn cách tính đúng phép tính $\frac{1}{5}\ x\ \frac{1}{3}$

a)

$\frac{1}{5}\ x\ \frac{1}{3}=\ \frac{2}{15}$

b)

$\frac{1}{5}\ x\ \frac{1}{3}=\ \frac{1}{15}$

c)

$\frac{1}{5}\ x\ \frac{1}{3}=\ \frac{1\ x\ 1}{5\ x\ 3\ }\ =\frac{2}{15}$

d)

$\frac{1}{5}\ x\ \frac{1}{3}=\ \frac{1\ x\ 1}{5\ x\ 3\ }\ =\frac{1}{15}$

9.

Một hình chữ nhật có chiều dài $\frac{8}{9}m$ và chiều rộng $\frac{3}{4}m$ . Diện tích của hình chữ nhật là :

a)

$\frac{11}{13}\ ^{m2}$

b)

$\frac{24}{36}\ ^{m2}$

c)

$\frac{2}{3}\ ^{m2}$

d)

$\frac{32}{27}\ ^{m2}$

10.

Một hình chữ nhật có diện tích $\frac{2}{3}m^2$ và chiều rộng $\frac{3}{4}m^2$ . Chiều dài của hình chữ nhật là :

a)

$\frac{6}{12}\ m$

b)

$\frac{1}{2}m$

c)

$\frac{8}{9}m$

d)

$\frac{9}{8}m$

PHÉP CHIA PHÂN SỐ LỚP 4 TH THUẬN KIỀU Q12

Total questions: 10

Worksheet time: 10mins

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