$\frac{1}{3}+\frac{1}{3}= $
$1-\frac{2}{5}= $
$\frac{1}{7}+\frac{1}{7}= $
$1-\frac{5}{8}= $
$\frac{3}{6}-\frac{1}{6}= $
$1-\frac{7}{9}= $
$\frac{7}{9}+\frac{2}{9}= $
$\frac{5}{6}+\frac{1}{6}= $
$1-\frac{4}{5}= $
$\frac{4}{5}-\frac{4}{5}= $
$\frac{5}{7}-\frac{2}{7}= $
$1-\frac{10}{12}= $
$1-\frac{2}{5}= $
$\frac{1}{7}+\frac{1}{7}= $
$1-\frac{5}{8}= $
$\frac{3}{6}-\frac{1}{6}= $
$1-\frac{7}{9}= $
$\frac{7}{9}+\frac{2}{9}= $
$\frac{5}{6}+\frac{1}{6}= $
$1-\frac{4}{5}= $
$\frac{4}{5}-\frac{4}{5}= $
$\frac{5}{7}-\frac{2}{7}= $
$1-\frac{10}{12}= $
答案:
解析:这些题目都是基础的分数加减法问题,主要考查学生对分数加减法的掌握程度。对于同分母的分数相加减,可以直接对分子进行相加减,分母保持不变。对于整数1减去一个分数的情况,可以将1看作与该分数有相同分母的假分数,然后再进行减法运算。
答案:
$\frac{1}{3} + \frac{1}{3} = \frac{2}{3}$
$1 - \frac{2}{5} = \frac{3}{5}$
$\frac{1}{7} + \frac{1}{7} = \frac{2}{7}$
$1 - \frac{5}{8} = \frac{3}{8}$
$\frac{3}{6} - \frac{1}{6} = \frac{2}{6} = \frac{1}{3}$
$1 - \frac{7}{9} = \frac{2}{9}$
$\frac{7}{9} + \frac{2}{9} = \frac{9}{9} = 1$
$\frac{5}{6} + \frac{1}{6} = \frac{6}{6} = 1$
$1 - \frac{4}{5} = \frac{1}{5}$
$\frac{4}{5} - \frac{4}{5} = 0$
$\frac{5}{7} - \frac{2}{7} = \frac{3}{7}$
$1 - \frac{10}{12} = \frac{2}{12} = \frac{1}{6}$
答案:
$\frac{1}{3} + \frac{1}{3} = \frac{2}{3}$
$1 - \frac{2}{5} = \frac{3}{5}$
$\frac{1}{7} + \frac{1}{7} = \frac{2}{7}$
$1 - \frac{5}{8} = \frac{3}{8}$
$\frac{3}{6} - \frac{1}{6} = \frac{2}{6} = \frac{1}{3}$
$1 - \frac{7}{9} = \frac{2}{9}$
$\frac{7}{9} + \frac{2}{9} = \frac{9}{9} = 1$
$\frac{5}{6} + \frac{1}{6} = \frac{6}{6} = 1$
$1 - \frac{4}{5} = \frac{1}{5}$
$\frac{4}{5} - \frac{4}{5} = 0$
$\frac{5}{7} - \frac{2}{7} = \frac{3}{7}$
$1 - \frac{10}{12} = \frac{2}{12} = \frac{1}{6}$
在○里填上“>”“<”或“=”
$\frac{2}{3} ◯ \frac{1}{3}$
$\frac{4}{5} ◯ \frac{3}{5}$
$\frac{6}{9} ◯ \frac{7}{9}$
$\frac{3}{3} ◯ \frac{7}{7}$
$\frac{3}{8} ◯ \frac{5}{8}$
$\frac{3}{7} ◯ \frac{4}{7}$
$\frac{3}{10} ◯ \frac{7}{10}$
$\frac{1}{4} ◯ \frac{3}{4}$
$1 ◯ \frac{4}{5}$
$1 ◯ \frac{6}{7}$
$1 ◯ \frac{8}{8}$
$\frac{2}{3} ◯ \frac{1}{3}$
$\frac{4}{5} ◯ \frac{3}{5}$
$\frac{6}{9} ◯ \frac{7}{9}$
$\frac{3}{3} ◯ \frac{7}{7}$
$\frac{3}{8} ◯ \frac{5}{8}$
$\frac{3}{7} ◯ \frac{4}{7}$
$\frac{3}{10} ◯ \frac{7}{10}$
$\frac{1}{4} ◯ \frac{3}{4}$
$1 ◯ \frac{4}{5}$
$1 ◯ \frac{6}{7}$
$1 ◯ \frac{8}{8}$
答案:
解析:本题考查的是分数大小的比较。主要考察对分数大小比较方法的理解和应用。比较同分母分数大小时,分母相同,分子大的分数就大;比较分子和分母相等的分数(即等于1的分数)与真分数的大小时,任何真分数都小于1。
答案:$\frac{2}{3}>\frac{1}{3}$,$\frac{4}{5} > \frac{3}{5}$,$\frac{6}{9} < \frac{7}{9}$,$\frac{3}{3} = \frac{7}{7}$,$\frac{3}{8} < \frac{5}{8}$,$\frac{3}{7} < \frac{4}{7}$,$\frac{3}{10} < \frac{7}{10}$,$\frac{1}{4} < \frac{3}{4}$,$1 > \frac{4}{5}$,$1 > \frac{6}{7}$,$1 = \frac{8}{8}$。
答案:$\frac{2}{3}>\frac{1}{3}$,$\frac{4}{5} > \frac{3}{5}$,$\frac{6}{9} < \frac{7}{9}$,$\frac{3}{3} = \frac{7}{7}$,$\frac{3}{8} < \frac{5}{8}$,$\frac{3}{7} < \frac{4}{7}$,$\frac{3}{10} < \frac{7}{10}$,$\frac{1}{4} < \frac{3}{4}$,$1 > \frac{4}{5}$,$1 > \frac{6}{7}$,$1 = \frac{8}{8}$。
$\frac{1}{8}+\frac{
$\frac{
$\frac{7}{9}-\frac{
$\frac{
$\frac{1}{4}+\frac{
$\frac{
$\frac{
$\frac{
$\frac{1}{5}+\frac{
$\frac{5}{9}-\frac{
$\frac{11}{12}+\frac{
4
}{8}= \frac{5}{8}$$\frac{
1
}{5}+\frac{2}{5}= \frac{3}{5}$$\frac{7}{9}-\frac{
2
}{9}= \frac{5}{9}$$\frac{
5
}{6}-\frac{1}{6}= \frac{4}{6}$$\frac{1}{4}+\frac{
2
}{4
}= \frac{3}{4}$$\frac{
4
}{7
}+\frac{2}{7}= \frac{6}{7}$$\frac{
2
}{3
}-\frac{1}{3}= \frac{1}{3}$$\frac{
4
}{6
}+\frac{2}{6}= 1$$\frac{1}{5}+\frac{
3
}{5
}= \frac{4}{5}$$\frac{5}{9}-\frac{
3
}{9}= \frac{2}{9}$$\frac{11}{12}+\frac{
1
}{12
}= 1$
答案:
解析:这些题目都是关于同分母分数加减法的填空题,需要找到合适的数使等式成立。可以通过简单的算术运算来找出缺失的分子。
答案:
$\frac{1}{8} + \frac{4}{8} = \frac{5}{8}$
$\frac{1}{5} + \frac{2}{5} = \frac{3}{5}$
$\frac{7}{9} - \frac{2}{9} = \frac{5}{9}$
$\frac{5}{6} - \frac{1}{6} = \frac{4}{6}$
$\frac{1}{4} + \frac{2}{4} = \frac{3}{4}$
$\frac{4}{7} + \frac{2}{7} = \frac{6}{7}$
$\frac{2}{3} - \frac{1}{3} = \frac{1}{3}$
$\frac{4}{6} + \frac{2}{6} = 1$
$\frac{1}{5} + \frac{3}{5} = \frac{4}{5}$
$\frac{5}{9} - \frac{3}{9} = \frac{2}{9}$
$\frac{11}{12} + \frac{1}{12} = 1$
答案:
$\frac{1}{8} + \frac{4}{8} = \frac{5}{8}$
$\frac{1}{5} + \frac{2}{5} = \frac{3}{5}$
$\frac{7}{9} - \frac{2}{9} = \frac{5}{9}$
$\frac{5}{6} - \frac{1}{6} = \frac{4}{6}$
$\frac{1}{4} + \frac{2}{4} = \frac{3}{4}$
$\frac{4}{7} + \frac{2}{7} = \frac{6}{7}$
$\frac{2}{3} - \frac{1}{3} = \frac{1}{3}$
$\frac{4}{6} + \frac{2}{6} = 1$
$\frac{1}{5} + \frac{3}{5} = \frac{4}{5}$
$\frac{5}{9} - \frac{3}{9} = \frac{2}{9}$
$\frac{11}{12} + \frac{1}{12} = 1$
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