Free Printable 三年级数学_分数的加法

1.

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

a)

$\frac{2}{6}$

b)

$\frac{1}{6}$

c)

$\frac{1}{2}$

d)

$\frac{5}{6}$

2.

$\frac{2}{4}+\frac{1}{4}=$

a)

$\frac{3}{8}$

b)

$\frac{1}{2}$

c)

$\frac{3}{4}$

d)

$\frac{1}{4}$

3.

$\frac{1}{7}\ +\ \ ?\ =\frac{6}{7}$

a)

$\frac{2}{7}$

b)

$\frac{3}{7}$

c)

$\frac{4}{7}$

d)

$\frac{5}{7}$

4.

$\frac{2}{9}\ +\ \ ?\ =\frac{5}{9}$

a)

$\frac{3}{9}$

b)

$\frac{4}{9}$

c)

$\frac{2}{9}$

d)

$\frac{5}{9}$

5.

以下哪一个算式是错误的？

a)

$\frac{3}{7}+\frac{2}{7}=\frac{3+2}{7}=\frac{5}{7}$

b)

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

c)

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

d)

$\frac{1}{9}+\frac{2}{9}=\frac{1+2}{9}=\frac{3}{9}=\frac{1}{3}$

6.

以下哪个答案不等于 $\frac{1}{2}$ ？

a)

$\frac{2}{10}+\frac{3}{10}$

b)

$\frac{1}{8}+\frac{3}{8}$

c)

$\frac{1}{4}+\frac{1}{4}$

d)

$\frac{1}{6}+\frac{1}{6}$

7.

哥哥和弟弟每人各吃了 $\frac{1}{8}$ 个葱油饼。他们共吃了几分之几个葱油饼？

a)

$\frac{1}{8}$ 个

b)

$\frac{1}{4}$ 个

c)

$\frac{3}{8}$ 个

d)

$\frac{1}{2}$ 个

8.

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

a)

$\frac{1}{3}$

b)

$\frac{2}{3}$

c)

$\frac{2}{6}$

9.

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

a)

$\frac{3}{5}$

b)

$\frac{3}{10}$

c)

$\frac{4}{5}$

10.

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

a)

$\frac{4}{10}$

b)

$\frac{2}{5}$

c)

$\frac{4}{20}$

11.

$\frac{3}{8}\ +\ \frac{1}{8}\ =\$

a)

$\frac{5}{8}$

b)

$\frac{4}{8}$

c)

$\frac{1}{2}$

12.

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

a)

$\frac{2}{4}$

b)

$\frac{1}{4}$

c)

$1$

13.

$\frac{4}{11}+\frac{7}{11}=?$

a)

$\frac{11}{22}$

b)

$\frac{11}{11}$

c)

$1$

d)

$\frac{3}{11}$

14.

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

a)

$\frac{2}{5}$

b)

$\frac{4}{10}$

c)

$\frac{4}{5}$

15.

计算两个分数的和，把答案化为最简分数。

a)

$\frac{1}{3}$

b)

$\frac{2}{3}$

c)

$\frac{1}{2}$

d)

$\frac{4}{6}$

三年级数学_分数的加法_同分母的加法

Total questions: 15

Worksheet time: 4hrs 45mins

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