一、我会口算。
$ \frac{1}{4} + \frac{1}{4} = $$ $$ \frac{7}{15} + \frac{11}{15} = $$ $$ 1 - \frac{3}{8} = $
$ \frac{5}{12} + \frac{7}{12} = $$ $$ \frac{13}{18} - \frac{7}{18} = $$ $$ \frac{9}{20} - \frac{3}{20} = $
$ \frac{15}{16} + \frac{9}{16} = $$ $$ \frac{1}{10} + \frac{7}{10} = $$ $$ \frac{4}{25} + \frac{6}{25} = $
$ \frac{1}{4} + \frac{1}{4} = $$ $$ \frac{7}{15} + \frac{11}{15} = $$ $$ 1 - \frac{3}{8} = $
$ \frac{5}{12} + \frac{7}{12} = $$ $$ \frac{13}{18} - \frac{7}{18} = $$ $$ \frac{9}{20} - \frac{3}{20} = $
$ \frac{15}{16} + \frac{9}{16} = $$ $$ \frac{1}{10} + \frac{7}{10} = $$ $$ \frac{4}{25} + \frac{6}{25} = $
答案
一、$\boldsymbol{\frac{1}{2}}$ $\boldsymbol{\frac{6}{5}}$ $\boldsymbol{\frac{5}{8}}$ 1 $\boldsymbol{\frac{1}{3}}$ $\boldsymbol{\frac{3}{10}}$ $\boldsymbol{1\frac{1}{2}}$ $\boldsymbol{\frac{4}{5}}$ $\boldsymbol{\frac{2}{5}}$
二、我会比。(在$◯$里填上“$>$”“$<$”或“$=$”)
$ \frac{1}{4} + \frac{1}{4} + \frac{1}{4} ◯ 1 $$ $$ \frac{1}{25} + \frac{3}{25} + \frac{12}{25} ◯ \frac{15}{25} $
$ \frac{15}{34} - \frac{4}{34} - \frac{10}{34} ◯ \frac{1}{34} $$ $$ \frac{29}{50} - \frac{20}{50} - \frac{3}{50} ◯ \frac{35}{50} $
$ \frac{1}{4} + \frac{1}{4} + \frac{1}{4} ◯ 1 $$ $$ \frac{1}{25} + \frac{3}{25} + \frac{12}{25} ◯ \frac{15}{25} $
$ \frac{15}{34} - \frac{4}{34} - \frac{10}{34} ◯ \frac{1}{34} $$ $$ \frac{29}{50} - \frac{20}{50} - \frac{3}{50} ◯ \frac{35}{50} $
答案
二、< > = <
三、我会选。
1. $$ \frac{a}{11} + \frac{b}{11} $$的结果是(
A. $$ \frac{a + b}{22} $B. $$ \frac{ab}{11} $
C. $$ \frac{a + b}{11} $D. $$ \frac{a + b}{121} $
1. $$ \frac{a}{11} + \frac{b}{11} $$的结果是(
C
)。A. $$ \frac{a + b}{22} $B. $$ \frac{ab}{11} $
C. $$ \frac{a + b}{11} $D. $$ \frac{a + b}{121} $
答案
1. C
2. 从1里面连续减(
A.1
B.2
C.3
D.4
C
)个$$ \frac{1}{4} $$,结果等于$$ \frac{1}{4} $$。A.1
B.2
C.3
D.4
答案
2. C
四、我会算。
$ \frac{1}{8} + \frac{1}{8} + \frac{7}{8} $$ $$ \frac{22}{23} - \frac{7}{23} - \frac{15}{23} $$ $$ \frac{2}{13} + \frac{5}{13} + \frac{4}{13} $
$ \frac{2}{15} + \frac{8}{15} + \frac{4}{15} $$ $$ \frac{1}{9} + \frac{2}{9} + \frac{4}{9} $$ $$ \frac{17}{20} - \frac{9}{20} - \frac{3}{20} $
$ 1 - \frac{3}{20} - \frac{3}{20} $$ $$ \frac{29}{34} - \frac{3}{34} - \frac{9}{34} $$ $$ \frac{7}{18} - \frac{5}{18} - \frac{1}{18} $
$ \frac{1}{8} + \frac{1}{8} + \frac{7}{8} $$ $$ \frac{22}{23} - \frac{7}{23} - \frac{15}{23} $$ $$ \frac{2}{13} + \frac{5}{13} + \frac{4}{13} $
$ \frac{2}{15} + \frac{8}{15} + \frac{4}{15} $$ $$ \frac{1}{9} + \frac{2}{9} + \frac{4}{9} $$ $$ \frac{17}{20} - \frac{9}{20} - \frac{3}{20} $
$ 1 - \frac{3}{20} - \frac{3}{20} $$ $$ \frac{29}{34} - \frac{3}{34} - \frac{9}{34} $$ $$ \frac{7}{18} - \frac{5}{18} - \frac{1}{18} $
答案
四、$\boldsymbol{1\frac{1}{8}}$ 0 $\boldsymbol{\frac{11}{13}}$ $\boldsymbol{\frac{14}{15}}$ $\boldsymbol{\frac{7}{9}}$ $\boldsymbol{\frac{1}{4}}$ $\boldsymbol{\frac{7}{10}}$ $\boldsymbol{\frac{1}{2}}$ $\boldsymbol{\frac{1}{18}}$
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