登录
一、口算。
$4 × 5\% =$
$\frac{5}{12} - \frac{3}{8} =$
$\frac{7}{8} × \frac{31}{14} =$
$0.1 + 0.09 =$
$5.2 × 0.6 =$
$\frac{5}{8} ÷ 0.75 =$
$\frac{1}{9} + \frac{2}{3} =$
$\frac{3}{4} × \frac{7}{18} =$
$3$
$\frac{5}{12} - \frac{1}{4} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{3}{4} × \frac{2}{3} =$
$\frac{5}{6} × \frac{3}{4} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{3}{4} × \frac{2}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{3}{4} × \frac{2}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{8} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{2}{5} =$
$4 × 5\% =$
0.2
$3.37 + 6.3 =$9.67
$\frac{5}{6} × \frac{2}{5} =$$\dfrac{1}{3}$
$\frac{5}{12} - \frac{3}{8} =$
$\dfrac{1}{24}$
$\frac{9}{16} ÷ \frac{3}{4} =$$\dfrac{3}{4}$
$\frac{4}{5} - \frac{3}{10} =$$\dfrac{1}{2}$
$\frac{7}{8} × \frac{31}{14} =$
$\dfrac{31}{16}$
$31.4\% + 30\% =$61.4%
$2.2 + 3.57 =$5.77
$0.1 + 0.09 =$
0.19
$2 - 66\% =$1.34
$\frac{3}{5} × \frac{5}{7} =$$\dfrac{3}{7}$
$5.2 × 0.6 =$
3.12
$60 ÷ 50\% =$120
$\frac{13}{14} - \frac{6}{7} =$$\dfrac{1}{14}$
$\frac{5}{8} ÷ 0.75 =$
$\dfrac{5}{6}$
$0.24 × 70 =$16.8
$\frac{5}{18} ÷ \frac{2}{3} =$$\dfrac{5}{12}$
$\frac{1}{9} + \frac{2}{3} =$
$\dfrac{7}{9}$
$3.14 - 0.85 =$2.29
$\frac{3}{4} + \frac{1}{9} =$$\dfrac{31}{36}$
$\frac{3}{4} × \frac{7}{18} =$
$\dfrac{7}{24}$
$\frac{7}{8} ÷ \frac{7}{10} =$$\dfrac{5}{4}$
$3.16 ÷ 0.4 =$7.9
$3$
$\frac{5}{12} - \frac{1}{4} =$
$\dfrac{1}{3}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{6}$
$\frac{3}{4} × \frac{2}{3} =$
$\dfrac{1}{2}$
$\frac{5}{6} × \frac{3}{4} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{6}$
$\frac{3}{4} × \frac{2}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{6}$
$\frac{3}{4} × \frac{2}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{8} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\dfrac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{1}{3} =$
$\frac{5}{8}$
$\frac{1}{2} + \frac{2}{5} =$
$\frac{9}{10}$
答案
一、0.2 9.67 $\dfrac{1}{3}$ $\dfrac{1}{24}$ $\dfrac{3}{4}$ $\dfrac{1}{2}$ $\dfrac{31}{16}$ 61.4% 5.77 0.19 1.34 $\dfrac{3}{7}$ 3.12 120 $\dfrac{1}{14}$ $\dfrac{5}{6}$ 16.8 $\dfrac{5}{12}$ $\dfrac{7}{9}$ 2.29 $\dfrac{31}{36}$ $\dfrac{7}{24}$ $\dfrac{5}{4}$ 7.9 2.52 $\dfrac{2}{9}$ 3 $\dfrac{2}{25}$ $\dfrac{1}{10}$ $\dfrac{9}{10}$
二、根据比例的基本性质，判断下面每组中的两个比能否组成比例。如果能，请把组成的比例写出来。
$4 : 5$$和$$0.3 : 0.4$$ $$\frac{1}{2} : \frac{1}{3}$$和$$12 : 8$$ $$0.6 : 0.2$$和$$\frac{3}{4} : \frac{1}{4}$
$4 : 5$$和$$0.3 : 0.4$$ $$\frac{1}{2} : \frac{1}{3}$$和$$12 : 8$$ $$0.6 : 0.2$$和$$\frac{3}{4} : \frac{1}{4}$
答案
二、不能组成比例
能组成比例
$\dfrac{1}{2}:\dfrac{1}{3}=12:8$
能组成比例
$0.6:0.2=\dfrac{3}{4}:\dfrac{1}{4}$
!
能组成比例
$\dfrac{1}{2}:\dfrac{1}{3}=12:8$
能组成比例
$0.6:0.2=\dfrac{3}{4}:\dfrac{1}{4}$
!
