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一、口算。
$1.5×600=$ $3.9 - 0.39=$ $0.74 + 4.6=$
$9÷1.5=$ $0.78 + 2.2=$ $1.5×8=$
$5 - 0.08=$ $2.5×0.5=$ $9.6÷0.32=$
$0.17×4=$ $3.25 + 0.75=$ $10 - 0.7=$
$0.8 + 0.62=$ $7.4÷2=$ $3.6×0.6=$
$\frac{4}{7}+\frac{1}{8}=$ $\frac{2}{5}-\frac{1}{9}=$ $\frac{7}{12}+\frac{1}{8}=$
$\frac{4}{5}-\frac{2}{3}=$ $\frac{5}{24}+\frac{2}{3}=$ $\frac{2}{3}-\frac{2}{11}=$
$\frac{5}{16}+\frac{1}{2}=$ $\frac{5}{6}-\frac{1}{8}=$ $\frac{1}{3}+\frac{8}{9}=$
$\frac{13}{24}-\frac{5}{18}=$ $\frac{9}{10}+\frac{1}{3}=$ $\frac{9}{10}-\frac{9}{40}=$
$\frac{9}{22}+\frac{5}{12}=$ $\frac{5}{11}+\frac{1}{22}=$ $\frac{3}{4}+\frac{7}{12}=$
$1.5×600=$ $3.9 - 0.39=$ $0.74 + 4.6=$
$9÷1.5=$ $0.78 + 2.2=$ $1.5×8=$
$5 - 0.08=$ $2.5×0.5=$ $9.6÷0.32=$
$0.17×4=$ $3.25 + 0.75=$ $10 - 0.7=$
$0.8 + 0.62=$ $7.4÷2=$ $3.6×0.6=$
$\frac{4}{7}+\frac{1}{8}=$ $\frac{2}{5}-\frac{1}{9}=$ $\frac{7}{12}+\frac{1}{8}=$
$\frac{4}{5}-\frac{2}{3}=$ $\frac{5}{24}+\frac{2}{3}=$ $\frac{2}{3}-\frac{2}{11}=$
$\frac{5}{16}+\frac{1}{2}=$ $\frac{5}{6}-\frac{1}{8}=$ $\frac{1}{3}+\frac{8}{9}=$
$\frac{13}{24}-\frac{5}{18}=$ $\frac{9}{10}+\frac{1}{3}=$ $\frac{9}{10}-\frac{9}{40}=$
$\frac{9}{22}+\frac{5}{12}=$ $\frac{5}{11}+\frac{1}{22}=$ $\frac{3}{4}+\frac{7}{12}=$
答案
$900 3.51 5.346 2.98 124.92 1.25 300.68 4 9.31.42 3.7 2.16\frac{39}{56} \frac{13}{45} \frac{17}{24}\frac{2}{15} \frac{7}{8} \frac{16}{33}\frac{13}{16} \frac{17}{24} \frac{11}{9}\frac{19}{72} \frac{37}{30} \frac{27}{40}\frac{109}{132} \frac{1}{2} \frac{4}{3}$
