《2025年同步口算练习册六年级数学上册人教版》

1. 直接写得数。
$\frac {3}{4}×\frac {3}{4}=$
$\frac {9}{20}×\frac {5}{27}=$
$42×\frac {4}{21}=$
$\frac {7}{8}-\frac {1}{8}=$
$1-\frac {3}{8}=$
$\frac {7}{9}×\frac {18}{35}=$
$\frac {4}{7}×\frac {3}{14}=$
$\frac {3}{8}×\frac {5}{6}=$
$\frac {5}{8}×\frac {2}{5}=$
$\frac {1}{3}+\frac {1}{4}=$
$\frac {14}{27}×\frac {9}{10}=$
$\frac {1}{6}×\frac {6}{7}=$
$\frac {2}{15}×\frac {25}{24}=$
$\frac {2}{7}-\frac {1}{9}=$
$\frac {1}{6}-\frac {1}{8}=$
$\frac {7}{13}×\frac {39}{14}=$

答案： $\frac {9}{16}$，$\frac {1}{12}$，8，$\frac {3}{4}$，$\frac {5}{8}$，$\frac {2}{5}$，$\frac {6}{49}$，$\frac {5}{16}$，$\frac {1}{4}$，$\frac {7}{12}$，$\frac {7}{15}$，$\frac {1}{7}$，$\frac {5}{36}$，$\frac {11}{63}$，$\frac {1}{24}$，$\frac {3}{2}$

2. 填空。
|小数|0.4| |0.125| | | |
|分数| | | |$\frac {3}{4}$|$\frac {1}{5}$| |
|除法算式| |$15÷12$| | | |$0.4÷8$|

答案： 0.4：$\frac {2}{5}$，$2÷5$；1.25：$\frac {5}{4}$，$15÷12$；0.125：$\frac {1}{8}$，$1÷8$；0.75：$\frac {3}{4}$，$3÷4$；0.2：$\frac {1}{5}$，$1÷5$；0.05：$\frac {1}{20}$，$0.4÷8$

3. 计算。
$1-\frac {2}{3}×\frac {9}{10}$
=( )-( )
$=\frac {2}{5}$
$(\frac {3}{4}-\frac {1}{6})×\frac {9}{10}$
$=( )×\frac {9}{10}$
=( )
$\frac {5}{6}×\frac {2}{15}×\frac {9}{8}$
$=( )×\frac {9}{8}$
=( )
$\frac {10}{9}-\frac {5}{6}×\frac {8}{45}$
$=\frac {10}{9}-( )$
=( )
$(\frac {9}{10}-\frac {7}{10})×\frac {5}{21}$
=( )×( )
$=\frac {1}{21}$
$\frac {8}{7}×\frac {7}{6}-\frac {1}{3}$
=( )-( )
=( )

答案： 1，$\frac {3}{5}$；$\frac {7}{12}$，$\frac {21}{40}$；$\frac {1}{9}$，$\frac {1}{8}$；$\frac {4}{27}$，$\frac {28}{27}$；$\frac {1}{5}$，$\frac {5}{21}$；$\frac {4}{3}$，$\frac {1}{3}$，1

连一连。
小红面向西站立，向左转$20^{\circ }$后面对的方向。——北偏东$20^{\circ }$方向
小亮面向北站立，向右转$20^{\circ }$后面对的方向。——南偏西$20^{\circ }$方向
小明面向南站立，向右转$20^{\circ }$后面对的方向。——西偏南$20^{\circ }$方向

答案： 小红—西偏南$20^{\circ }$方向，小亮—北偏东$20^{\circ }$方向，小明—南偏西$20^{\circ }$方向