《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。（每题 1 分，共 27 分）
$\frac{6}{11} \div \frac{3}{11} =$ $\frac{2}{3} \times 30\% =$ $0.4 \times 1.8 =$
$1 - 86\% =$ $\frac{7}{12} + \frac{1}{24} =$ $\frac{14}{15} \times \frac{5}{21} =$
$0.75 + 0.75 =$ $900 - 733 =$ $\frac{5}{6} \div 30 =$
$\frac{4}{5} \times \frac{55}{56} =$ $\frac{2}{9} \div 4 =$ $6 - 0.91 =$
$81 \div 90\% =$ $28 \times \frac{3}{4} =$ $4.6 \div 23\% =$
$2.42 \times 0.7 =$ $3.5 \times \frac{5}{7} =$ $10 - 0.9 =$
$0.5 \div 1.25 =$ $2.4 + 1.56 =$ $4.5 \times 0.8 =$
$\frac{5}{8} - \frac{1}{4} =$ $\frac{5}{9} \times \frac{3}{5} =$ $3.5 \times 10.1 =$
$600 \times 5\% =$ $0.72 \div 3.6 =$ $210 - 68 =$

答案： 2@@$\frac{1}{5}$@@0.72@@0.14@@$\frac{5}{8}$@@$\frac{2}{9}$@@1.5@@167@@$\frac{1}{36}$@@$\frac{11}{14}$@@$\frac{1}{18}$@@5.09@@90@@21@@20@@1.694@@2.5@@9.1@@0.4@@3.96@@3.6@@$\frac{3}{8}$@@$\frac{1}{3}$@@35.35@@30@@0.2@@142

二、解方程。（每题 3 分，共 36 分）
$\frac{3}{4}x + 8 \times 0.5 = 13$ $3x - 0.8 \times 75\% = 2.1$ $\frac{5}{8}x - \frac{1}{4}x = 36.9$
$5x - 2.5 \times 16 = 3.5$ $(1 - 30\%)x = 56$ $3x - 25 - 2x = 0$
$\frac{1}{2}x + \frac{2}{5}x = 99$ $x \div (\frac{5}{6} - \frac{3}{8}) = 72$ $30\%x + 25 \times 36\% = 48$
$\frac{3}{8}x - \frac{1}{5}x = 21$ $\frac{3}{4}x + \frac{1}{8} = 37.5\%$ $4.2x \div 1.6 - 14 = 0.175$

答案： $x = 12$@@$x = 0.9$@@$x = 98.4$@@$x = 8.7$@@$x = 80$@@$x = 25$@@$x = 110$@@$x = 33$@@$x = 130$@@$x = 120$@@$x = \frac{1}{3}$@@$x = 5.4$