一、口算。(每题1分,共27分)
$25×32=$ $2400÷80=$ $270 + 330=$
$3 - \frac{4}{3}=$ $1.3×7=$ $0.92÷2.3=$
$0.125×16=$ $\frac{25}{44}÷\frac{5}{22}=$ $6.8 - 4.9=$
$\frac{7}{10}÷\frac{1}{15}=$ $\frac{7}{8} - \frac{3}{40}=$ $\frac{1}{10} + \frac{3}{5}=$
$\frac{7}{12}×\frac{4}{7}=$ $1.1÷5.5=$ $\frac{2}{3}÷\frac{3}{4}=$
$1.4 + 3.06=$ $\frac{1}{3} - \frac{1}{8}=$ $4.5×0.04=$
$18÷20\%=$ $\frac{4}{9}÷\frac{15}{16}=$ $1.56 + 7.54=$
$\frac{7}{15}×225=$ $68×10\%=$ $\frac{5}{6} + \frac{1}{6}=$
$\frac{7}{12} + \frac{1}{3}=$ $4 - \frac{5}{4}=$ $6÷\frac{1}{3}=$
$25×32=$ $2400÷80=$ $270 + 330=$
$3 - \frac{4}{3}=$ $1.3×7=$ $0.92÷2.3=$
$0.125×16=$ $\frac{25}{44}÷\frac{5}{22}=$ $6.8 - 4.9=$
$\frac{7}{10}÷\frac{1}{15}=$ $\frac{7}{8} - \frac{3}{40}=$ $\frac{1}{10} + \frac{3}{5}=$
$\frac{7}{12}×\frac{4}{7}=$ $1.1÷5.5=$ $\frac{2}{3}÷\frac{3}{4}=$
$1.4 + 3.06=$ $\frac{1}{3} - \frac{1}{8}=$ $4.5×0.04=$
$18÷20\%=$ $\frac{4}{9}÷\frac{15}{16}=$ $1.56 + 7.54=$
$\frac{7}{15}×225=$ $68×10\%=$ $\frac{5}{6} + \frac{1}{6}=$
$\frac{7}{12} + \frac{1}{3}=$ $4 - \frac{5}{4}=$ $6÷\frac{1}{3}=$
答案
800 30 600
$\frac{5}{3}$ 9.1 0.4
2 $\frac{5}{2}$ 1.9
$\frac{21}{2}$ $\frac{4}{5}$ $\frac{7}{10}$
$\frac{1}{3}$ 0.2 $\frac{8}{9}$
4.46 $\frac{5}{24}$ 0.18
90 $\frac{64}{135}$ 9.1
105 6.8 1
$\frac{11}{12}$ $\frac{11}{4}$ 18
$\frac{5}{3}$ 9.1 0.4
2 $\frac{5}{2}$ 1.9
$\frac{21}{2}$ $\frac{4}{5}$ $\frac{7}{10}$
$\frac{1}{3}$ 0.2 $\frac{8}{9}$
4.46 $\frac{5}{24}$ 0.18
90 $\frac{64}{135}$ 9.1
105 6.8 1
$\frac{11}{12}$ $\frac{11}{4}$ 18
二、用竖式计算,带*的要验算。(第1题3分,其余每题3.5分,共10分)
$70.06 - 24.59$ $0.17×0.38$ (得数保留两位小数) *$0.396÷1.2$
$70.06 - 24.59$ $0.17×0.38$ (得数保留两位小数) *$0.396÷1.2$
答案
45.47 0.06 0.33
三、解方程或比例。(每题3分,共27分)
$1.5:2.5 = x:7.5$ $\frac{1}{3}:\frac{1}{10}=\frac{8}{9}:x$ $1.3:x = 5.2:20$
$\frac{9}{22}x + \frac{1}{11}=\frac{3}{22}$ $\frac{7}{9}x + 0.25=\frac{5}{4}$ $5.6:\frac{8}{7}=63:x$
$(19\% - x)×500\%=\frac{1}{4}$ $\frac{1}{8}x + \frac{1}{9}x=\frac{1}{48}$ $(x - 18\%)÷\frac{16}{9}=18\%$
$1.5:2.5 = x:7.5$ $\frac{1}{3}:\frac{1}{10}=\frac{8}{9}:x$ $1.3:x = 5.2:20$
$\frac{9}{22}x + \frac{1}{11}=\frac{3}{22}$ $\frac{7}{9}x + 0.25=\frac{5}{4}$ $5.6:\frac{8}{7}=63:x$
$(19\% - x)×500\%=\frac{1}{4}$ $\frac{1}{8}x + \frac{1}{9}x=\frac{1}{48}$ $(x - 18\%)÷\frac{16}{9}=18\%$
答案
$x = 4.5$ $x = \frac{4}{15}$ $x = 5$
$x = \frac{1}{9}$ $x = \frac{9}{7}$ $x = \frac{90}{7}$
$x = \frac{7}{50}$ $x = \frac{3}{34}$ $x = 50\%$
$x = \frac{1}{9}$ $x = \frac{9}{7}$ $x = \frac{90}{7}$
$x = \frac{7}{50}$ $x = \frac{3}{34}$ $x = 50\%$
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