《2025年通城学典计算能手五年级数学下册青岛版五四制》

一、口算。
3.14×4 = 3.72 + 4.18 = $\frac{5}{6}×\frac{8}{5} =$
9.42÷3.14 = 2.48 - 1.59 = $\frac{5}{8}÷\frac{5}{24} =$
25.12÷3.14 = 0.72÷0.9 = $\frac{7}{5} - \frac{3}{5} =$
12.56÷3.14 = 6.5 - 5.6 = 39×$\frac{5}{26} =$
3.14×3² = 40×5 = $\frac{9}{2}÷\frac{12}{5} =$
3.14÷0.1 = 1.57×0.2 = $\frac{2}{3} + \frac{2}{5} =$
3.14×7 = 34÷$\frac{51}{4} =$ $\frac{21}{5}×\frac{35}{6} =$
3.14×0.9 = $\frac{4}{3} - \frac{3}{10} =$ $\frac{17}{5} + 2 =$
28.26÷3.14 = $\frac{60}{7}÷4 =$ $\frac{6}{7}×\frac{5}{9} =$
3.14×200 = 2$\frac{1}{4}×\frac{1}{18} =$ 1 - $\frac{4}{7} =$

答案： 12.56@@7.9@@$\frac{4}{3}$@@3@@0.89@@3@@8@@0.8@@$\frac{4}{5}$@@4@@0.9@@$\frac{15}{2}$@@28.26@@200@@$\frac{15}{8}$@@31.4@@0.314@@$\frac{16}{15}$@@21.98@@$\frac{8}{3}$@@$\frac{49}{2}$@@2.826@@$\frac{31}{30}$@@$\frac{27}{5}$@@9@@$\frac{15}{7}$@@$\frac{10}{21}$@@628@@$\frac{1}{8}$@@$\frac{3}{7}$

二、计算下面各题，怎样简便就怎样计算。
57.5 - 4.35 - 15.65 225 - 225÷5 + 101 0.6÷[$\frac{2}{7}×(5.375 - \frac{3}{8})$]

答案： 37.5@@281@@$\frac{21}{50}$