Free Printable cộng trừ phân số

1.

\frac{2}{5}+\frac{1}{5}=?

a)

$\frac{2}{5}+\frac{1}{5}=\frac{2+1}{5}=\frac{3}{5}$

b)

$\frac{2}{5}+\frac{1}{5}=\frac{2+1}{5+5}=\frac{3}{10}$

c)

$\frac{2}{5}+\frac{1}{5}=\frac{1}{5+5}=\frac{1}{10}$

2.

\frac{7}{11}-\frac{5}{11}=?

a)

$\frac{7}{11}-\frac{5}{11}=\frac{7-5}{11-11}=\frac{2}{0}=0$

b)

$\frac{7}{11}-\frac{5}{11}=\frac{7-5}{11-5}=\frac{2}{6}=\frac{1}{3}$

c)

$\frac{7}{11}-\frac{5}{11}=\frac{7-5}{11}=\frac{2}{11}$

3.

\frac{3}{4}-\frac{2}{7}=?

a)

$\frac{3}{4}-\frac{2}{7}=\frac{3-2}{7-4}=\frac{1}{3}$

b)

$\frac{3}{4}-\frac{2}{7}=\frac{21}{28}-\frac{8}{28}=\frac{13}{28}$

c)

$\frac{3}{4}-\frac{2}{7}=\frac{3}{4}-\frac{2}{4}=\frac{1}{4}$

4.

\frac{2}{3}+\frac{4}{5}=?

a)

$\frac{2}{3}+\frac{4}{5}=\frac{2}{3}+\frac{4}{3}=\frac{6}{3}=2$

b)

$\frac{2}{3}+\frac{4}{5}=\frac{2+4}{3+5}=\frac{6}{8}=\frac{3}{4}$

c)

$\frac{2}{3}+\frac{4}{5}=\frac{10}{15}+\frac{12}{15}=\frac{22}{15}$

5.

\frac{1}{2}+\frac{1}{3}=?

a)

$\frac{1}{2}+\frac{1}{3}=\frac{3}{6}+\frac{2}{6}=\frac{5}{6}$

b)

$\frac{1}{2}+\frac{1}{3}=\frac{1+1}{2+3}=\frac{2}{5}$

c)

$\frac{1}{2}+\frac{1}{3}=\frac{1}{2+3}=\frac{1}{5}$

6.

$1\ +\frac{2}{3}=\ ?$

a)

$\frac{2}{3}$

b)

$\frac{3}{5}$

c)

$\frac{5}{3}$

d)

$\frac{4}{5}$

7.

Phân số chỉ phần màu cam là?

a)

$\frac{2}{8}$

b)

$\frac{8}{2}$

c)

$\frac{3}{8}$

d)

$\frac{2}{7}$

8.

Tìm x: $\frac{4}{7}-x=\frac{3}{7}$

a)

$\frac{7}{7}$

b)

$1$

c)

$\frac{1}{7}$

d)

$\frac{1}{14}$

9.

$2+\frac{5}{8}=?$

a)

$\frac{2}{1}+\frac{5}{8}=\frac{16}{8}+\frac{5}{8}=\frac{16+5}{8}=\frac{21}{8}$

b)

$\frac{2+5}{8}=\frac{7}{8}$

c)

$\frac{2}{1}+\frac{5}{8}=\frac{2+5}{1+8}=\frac{7}{9}$

d)

$\frac{2}{1}+\frac{5}{8}=\frac{16+5}{8}=\frac{21}{8}$

cộng trừ phân số

Total questions: 9

Worksheet time: 5mins