《2025年阳光同学计算小达人六年级数学上册苏教版》

1. 直接写出得数。(建议3分钟完成)
$\frac {8}{9}÷4=$$\frac{2}{9}$
$\frac {5}{8}÷25=$$\frac{1}{40}$
$\frac {7}{10}÷\frac {7}{8}=$$\frac{4}{5}$
$20÷\frac {5}{7}=$28
$9÷\frac {6}{7}=$$\frac{21}{2}$
$\frac {12}{13}÷\frac {4}{13}=$3
$\frac {3}{5}×\frac {1}{2}=$$\frac{3}{10}$
$\frac {3}{11}÷\frac {6}{5}=$$\frac{5}{22}$
$\frac {4}{5}-\frac {1}{2}=$$\frac{3}{10}$
$\frac {3}{4}×\frac {2}{5}=$$\frac{3}{10}$
$\frac {6}{7}÷\frac {2}{49}=$21
$3-\frac {2}{3}=$$2\frac{1}{3}$
$24×\frac {5}{36}=$$\frac{10}{3}$
$8+\frac {1}{8}=$$8\frac{1}{8}$
$\frac {5}{16}×\frac {8}{15}=$$\frac{1}{6}$
$\frac {3}{4}÷\frac {4}{3}=$$\frac{9}{16}$
$14-\frac {5}{7}=$$13\frac{2}{7}$
$\frac {10}{9}×\frac {9}{8}=$$\frac{5}{4}$
$\frac {5}{12}÷\frac {5}{6}=$$\frac{1}{2}$
$28×\frac {5}{14}=$10
$63×\frac {4}{27}=$$\frac{28}{3}$
$\frac {7}{8}+\frac {7}{8}=$$\frac{7}{4}$
$\frac {7}{8}÷\frac {7}{8}=$1
$4÷\frac {3}{8}=$$\frac{32}{3}$

答案： 1. $\frac{2}{9}$ $\frac{1}{40}$ $\frac{4}{5}$ 28 $\frac{21}{2}$ 3 $\frac{3}{10}$ $\frac{5}{22}$ $\frac{3}{10}$ $\frac{3}{10}$ 21 $2\frac{1}{3}$ $\frac{10}{3}$ $8\frac{1}{8}$ $\frac{1}{6}$ $\frac{9}{16}$ $13\frac{2}{7}$ $\frac{5}{4}$ $\frac{1}{2}$ 10 $\frac{28}{3}$ $\frac{7}{4}$ 1 $\frac{32}{3}$

2. 求出下面各比的比值。(建议5分钟完成)
$\frac {2}{15}:\frac {8}{25}=$$\frac{5}{12}$
$\frac {3}{40}:\frac {7}{10}=$$\frac{3}{28}$
$\frac {42}{70}=$$\frac{3}{5}$
$80:32=$$\frac{5}{2}$
$0.72:0.6=$$\frac{6}{5}$
$1.8:0.27=$$\frac{20}{3}$
$\frac {9}{25}:\frac {3}{10}=$$\frac{6}{5}$
$\frac {8}{9}:\frac {5}{18}=$$\frac{16}{5}$
$\frac {5}{8}:\frac {7}{6}=$$\frac{15}{28}$
$14:\frac {3}{2}=$$\frac{28}{3}$
$0.12:\frac {1}{6}=$0.72
$\frac {7}{10}吨:700千克=$1
$4.5:0.3=$15
$\frac {8}{15}:\frac {4}{5}=$$\frac{2}{3}$
$0.5时:30分=$1

答案： 2. $\frac{5}{12}$ $\frac{3}{28}$ $\frac{3}{5}$ $\frac{5}{2}$ $\frac{6}{5}$ $\frac{20}{3}$ $\frac{6}{5}$ $\frac{16}{5}$ $\frac{15}{28}$ $\frac{28}{3}$ 0.72 1 15 $\frac{2}{3}$ 1

(1)甲数是乙数的1.2倍,则甲数$:乙数= ($6:5$)$。
(2)甲数与乙数的$\frac {3}{4}$相等,则甲数$:乙数= ($3:4$)$。
(3)甲数的$\frac {2}{5}等于乙数的\frac {3}{4}$,则甲数$:乙数= ($15:8$)$。

答案： （1）6:5 （2）3:4 （3）15:8