《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。
$\frac{5}{8} + \frac{1}{2} =$ $\frac{4}{5} \div \frac{2}{7} =$ $\frac{1}{12} \times \frac{24}{25} =$
$\frac{3}{8} \div \frac{12}{17} =$ $\frac{3}{40} \times \frac{5}{8} =$ $\frac{3}{7} - \frac{2}{21} =$
$1.95 \div 0.4 =$ $\frac{5}{8} \div \frac{1}{10} =$ $0.5 \times 2.2 =$
$2.5 \times 8.8 =$ $\frac{9}{2} - \frac{1}{6} =$ $3.2 + 15\% =$
$3.15 + 0.76 =$ $24.06 + 0.4 =$ $\frac{7}{22} + \frac{3}{11} =$
$0.05 \times 0.3 =$ $\frac{3}{16} \div 37.5\% =$ $\frac{4}{7} \div \frac{1}{9} =$
$\frac{1}{14} + \frac{4}{5} =$ $2 - \frac{1}{9} =$ $21.7 \div 0.7 =$
$\frac{7}{12} \times \frac{3}{14} =$ $15 \div \frac{3}{8} =$ $460 - 99 =$
$3.8 \div 0.38 =$ $\frac{1}{4} \div \frac{4}{7} =$ $\frac{3}{7} + 3 =$
$\frac{4}{5} - \frac{1}{14} =$ $2.12 - 1.2 =$ $\frac{2}{9} \div \frac{8}{5} =$

答案： $\frac{9}{8}$@@$\frac{14}{5}$@@$\frac{2}{25}$@@$\frac{17}{32}$@@$\frac{3}{64}$@@$\frac{1}{3}$@@4.875@@$\frac{25}{4}$@@1.1@@22@@$\frac{13}{3}$@@3.35@@3.91@@24.46@@$\frac{13}{22}$@@0.015@@$\frac{1}{2}$@@$\frac{36}{7}$@@$\frac{61}{70}$@@$1\frac{8}{9}$@@31@@$\frac{1}{8}$@@40@@361@@10@@$\frac{7}{16}$@@$3\frac{3}{7}$@@$\frac{51}{70}$@@0.92@@$\frac{5}{36}$

二、解方程和比例。
$\frac{x}{2.4} = \frac{15}{0.8}$ $\frac{2}{3}x - 4 \times 25\% = \frac{3}{7}$ $56\%x - \frac{1}{4} = \frac{7}{12}$

答案： $x = 45$@@$x = \frac{15}{7}$@@$x = \frac{125}{84}$