《2025年阳光同学计算小达人六年级数学下册人教版》

1. 口算。
$12×50 =$ $\frac{3}{4}×\frac{7}{2}=$ $3.14×0.7 =$
$0.25×0.8 =$ $\frac{56}{5}×\frac{15}{8}=$ $3.14×0.5^{2} =$
$51×0.001 =$ $1\frac{3}{4}÷\frac{3}{14}=$ $2×3.14×8×\frac{1}{2} =$
$25÷125 =$ $\frac{1}{9}÷1\frac{1}{5}=$ $3.14×5^{2}-3.14×4^{2} =$
$3.6÷0.06 =$ $0.2×\frac{3}{10}=$ $3.14×(20^{2}-10^{2}) =$
$8.2÷4 =$ $\frac{6}{5}×1.2 =$ $3.14×(40÷2)^{2} =$
$\frac{21}{25}÷42 =$ $\frac{5}{2}×15\% =$ $50.24÷3.14÷2 =$
$\frac{5}{9}×\frac{3}{5} =$ $130\%÷\frac{1}{2}=$ $(18.84÷3.14÷2)^{2} =$

答案：

2. 化简比。
$36:18 =$ $15:105 =$ $4.5\ m:1.5\ dm =$
$\frac{5}{4}:1.25 =$ $45\%:\frac{9}{10}=$ $1.2$时$:18$分$ =$
$\frac{3}{8}:\frac{2}{9} =$ $\frac{5}{18}:\frac{10}{9} =$ $5.4\ m^{2}:1.6\ m^{2} =$
$4:\frac{1}{4} =$ $\frac{2}{5}:20\% =$ $8\ cm^{3}:0.75\ dm^{3} =$

答案：

3. 计算下面各题，能简算的要简算。
$\frac{5}{6}×(5.4 - \frac{2}{5})$ $25\%×43.7\%÷\frac{1}{4}$ $97×\frac{5}{96}$
$85×\frac{2}{5}+40\%×16 - 0.4$ $39\frac{13}{24}÷13$ $(\frac{2}{3}+\frac{4}{15}×\frac{5}{6})÷\frac{20}{21}$
$\frac{1}{3}÷[\frac{8}{9}-(\frac{14}{15}-\frac{1}{3})]$ $25×17\%+25×62\%+\frac{1}{4}$

答案：