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一、口算。
$275÷25=$
$52×0.5=$
$\frac {4}{3}-\frac {1}{2}=$
$2.65-1.78=$
$0.64÷0.16=$
$\frac {8}{9}×\frac {3}{16}=$
$314×0.09=$
$\frac {14}{15}×\frac {5}{21}=$
$50\% -\frac {1}{7}=$
$600×\frac {5}{12}=$
$7.2÷18\% =$
$2.8+8.2=$
$18^{2}=$
$10\% +\frac {1}{4}=$
$65×101=$
$\frac {7}{12}÷\frac {9}{10}=$
$\frac {3}{5}×\frac {15}{4}=$
$4.6-2.54=$
$\frac {3}{8}+\frac {3}{10}=$
$\frac {7}{16}+\frac {1}{4}=$
$\frac {7}{9}÷\frac {4}{}$=
$275÷25=$
11
$52×0.5=$
26
$\frac {4}{3}-\frac {1}{2}=$
$\dfrac{5}{6}$
$2.65-1.78=$
0.87
$0.64÷0.16=$
4
$\frac {8}{9}×\frac {3}{16}=$
$\dfrac{1}{6}$
$314×0.09=$
28.26
$\frac {14}{15}×\frac {5}{21}=$
$\dfrac{2}{9}$
$50\% -\frac {1}{7}=$
$\dfrac{5}{14}$
$600×\frac {5}{12}=$
250
$7.2÷18\% =$
40
$2.8+8.2=$
11
$18^{2}=$
324
$10\% +\frac {1}{4}=$
$\dfrac{7}{20}$
$65×101=$
6565
$\frac {7}{12}÷\frac {9}{10}=$
$\dfrac{35}{54}$
$\frac {3}{5}×\frac {15}{4}=$
$\dfrac{9}{4}$
$4.6-2.54=$
2.06
$\frac {3}{8}+\frac {3}{10}=$
$\dfrac{27}{40}$
$\frac {7}{16}+\frac {1}{4}=$
$\dfrac{11}{16}$
$\frac {7}{9}÷\frac {4}{}$=
$\dfrac{35}{36}$
答案
一、11 26 $\dfrac{5}{6}$
0.87 4 $\dfrac{1}{6}$
28.26 $\dfrac{2}{9}$ $\dfrac{5}{14}$
250 40 11
324 $\dfrac{7}{20}$ 6565
$\dfrac{35}{54}$ $\dfrac{9}{4}$ 2.06
$\dfrac{27}{40}$ $\dfrac{11}{16}$ $\dfrac{35}{36}$
0.87 4 $\dfrac{1}{6}$
28.26 $\dfrac{2}{9}$ $\dfrac{5}{14}$
250 40 11
324 $\dfrac{7}{20}$ 6565
$\dfrac{35}{54}$ $\dfrac{9}{4}$ 2.06
$\dfrac{27}{40}$ $\dfrac{11}{16}$ $\dfrac{35}{36}$
二、解方程或比例。
$5x-3x=3.8$
$75:x=2.5:12$
$\frac {1}{2}x+\frac {2}{5}x=\frac {2}{7}×\frac {6}{5}$
$\frac {0.7}{14.7}=\frac {6}{x}$
$2x÷1.2=\frac {5}{18}$
$\frac {5}{6}:x=50\% :\frac {3}{10}$
$5x-3x=3.8$
$75:x=2.5:12$
$\frac {1}{2}x+\frac {2}{5}x=\frac {2}{7}×\frac {6}{5}$
$\frac {0.7}{14.7}=\frac {6}{x}$
$2x÷1.2=\frac {5}{18}$
$\frac {5}{6}:x=50\% :\frac {3}{10}$
答案
二、$x=1.9$ $x=360$ $x=\dfrac{8}{21}$
$x=126$ $x=\dfrac{1}{6}$ $x=\dfrac{1}{2}$
$x=126$ $x=\dfrac{1}{6}$ $x=\dfrac{1}{2}$
