一、数学法官判对错
1. $\frac{16}{24}$约分成最简分数为$\frac{4}{6}$。(
2. $1-\frac{1}{10}=\frac{10}{10}-\frac{1}{10}=\frac{9}{10}$。(
1. $\frac{16}{24}$约分成最简分数为$\frac{4}{6}$。(
×
)2. $1-\frac{1}{10}=\frac{10}{10}-\frac{1}{10}=\frac{9}{10}$。(
√
)答案
1. × 2. √
1.把3张饼平均分成5份,每份是(
A.$\frac{5}{3}$
B.$\frac{3}{5}$
C.$\frac{1}{5}$
B
)张饼。A.$\frac{5}{3}$
B.$\frac{3}{5}$
C.$\frac{1}{5}$
答案
B
2. 下面没有约成最简分数的是(
A.$\dfrac{16}{36}=\dfrac{8}{18}$
B.$\dfrac{20}{36}=\dfrac{5}{9}$
C.$\dfrac{14}{46}=\dfrac{7}{23}$
A
)。A.$\dfrac{16}{36}=\dfrac{8}{18}$
B.$\dfrac{20}{36}=\dfrac{5}{9}$
C.$\dfrac{14}{46}=\dfrac{7}{23}$
答案
A
三、找朋友(连一连)

答案
$\frac{5}{24}+\frac{7}{24}=\frac{12}{24}=\frac{1}{2}$,连接 $\frac{1}{2}$
$\frac{1}{10}+\frac{7}{10}=\frac{8}{10}=\frac{4}{5}$,连接 $\frac{4}{5}$
$\frac{1}{12}+\frac{2}{12}=\frac{3}{12}=\frac{1}{4}$,连接 $\frac{1}{4}$
$\frac{2}{3}+\frac{1}{3}=1$,连接 $1$
$\frac{4}{9}+\frac{2}{9}=\frac{6}{9}=\frac{2}{3}$,连接 $\frac{2}{3}$
$\frac{7}{12}-\frac{5}{12}=\frac{2}{12}=\frac{1}{6}$,连接 $\frac{1}{6}$
$\frac{3}{4}-\frac{1}{4}=\frac{2}{4}=\frac{1}{2}$,连接 $\frac{1}{2}$
$\frac{9}{10}-\frac{3}{10}=\frac{6}{10}=\frac{3}{5}$,连接 $\frac{3}{5}$
$1-\frac{6}{8}=\frac{2}{8}=\frac{1}{4}$,连接 $\frac{1}{4}$
$\frac{13}{16}-\frac{7}{16}=\frac{6}{16}=\frac{3}{8}$,连接 $\frac{3}{8}$
$\frac{1}{10}+\frac{7}{10}=\frac{8}{10}=\frac{4}{5}$,连接 $\frac{4}{5}$
$\frac{1}{12}+\frac{2}{12}=\frac{3}{12}=\frac{1}{4}$,连接 $\frac{1}{4}$
$\frac{2}{3}+\frac{1}{3}=1$,连接 $1$
$\frac{4}{9}+\frac{2}{9}=\frac{6}{9}=\frac{2}{3}$,连接 $\frac{2}{3}$
$\frac{7}{12}-\frac{5}{12}=\frac{2}{12}=\frac{1}{6}$,连接 $\frac{1}{6}$
$\frac{3}{4}-\frac{1}{4}=\frac{2}{4}=\frac{1}{2}$,连接 $\frac{1}{2}$
$\frac{9}{10}-\frac{3}{10}=\frac{6}{10}=\frac{3}{5}$,连接 $\frac{3}{5}$
$1-\frac{6}{8}=\frac{2}{8}=\frac{1}{4}$,连接 $\frac{1}{4}$
$\frac{13}{16}-\frac{7}{16}=\frac{6}{16}=\frac{3}{8}$,连接 $\frac{3}{8}$
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