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一、口算。
$0.56÷0.08=$
$\frac {11}{12}-\frac {5}{6}=$
$\frac {5}{7}+\frac {1}{14}=$
$2÷20\% =$
$\frac {3}{4}×\frac {2}{7}=$
$92÷2.3=$
$\frac {1}{2}-40\% =$
$0.44+2.66=$
$4.18×20=$
$55×80\% =$
$40\% ÷20=$
$0.75+7.5=$
$0.48×5=$
$\frac {3}{2}-\frac {2}{3}=$
$12.5×0.4=$
$\frac {9}{20}÷\frac {3}{4}=$
$\frac {2}{3}×\frac {5}{16}=$
$2.72-1.95=$
$\frac {1}{4}+\frac {5}{6}=$
$\frac {1}{7}-\frac {1}{8}=$
$\frac {7}{8}÷\frac {14}{15}=$
$0.56÷0.08=$
7
$\frac {11}{12}-\frac {5}{6}=$
$\frac{1}{12}$
$\frac {5}{7}+\frac {1}{14}=$
$\frac{11}{14}$
$2÷20\% =$
10
$\frac {3}{4}×\frac {2}{7}=$
$\frac{3}{14}$
$92÷2.3=$
40
$\frac {1}{2}-40\% =$
0.1
$0.44+2.66=$
3.1
$4.18×20=$
83.6
$55×80\% =$
44
$40\% ÷20=$
0.02
$0.75+7.5=$
8.25
$0.48×5=$
2.4
$\frac {3}{2}-\frac {2}{3}=$
$\frac{5}{6}$
$12.5×0.4=$
5
$\frac {9}{20}÷\frac {3}{4}=$
$\frac{3}{5}$
$\frac {2}{3}×\frac {5}{16}=$
$\frac{5}{24}$
$2.72-1.95=$
0.77
$\frac {1}{4}+\frac {5}{6}=$
$\frac{13}{12}$
$\frac {1}{7}-\frac {1}{8}=$
$\frac{1}{56}$
$\frac {7}{8}÷\frac {14}{15}=$
$\frac{15}{16}$
答案
一、7 $\frac{1}{12}$ $\frac{11}{14}$
10 $\frac{3}{14}$ 40
0.1 3.1 83.6
44 0.02 8.25
2.4 $\frac{5}{6}$ 5
$\frac{3}{5}$ $\frac{5}{24}$ 0.77
$\frac{13}{12}$ $\frac{1}{56}$ $\frac{15}{16}$
10 $\frac{3}{14}$ 40
0.1 3.1 83.6
44 0.02 8.25
2.4 $\frac{5}{6}$ 5
$\frac{3}{5}$ $\frac{5}{24}$ 0.77
$\frac{13}{12}$ $\frac{1}{56}$ $\frac{15}{16}$
二、计算下面各图形的体积。
答案
二、$\frac{1}{3} × 3.14 × (7 ÷ 2)^2 × 9 = 115.395(\mathrm{cm}^3)$
$3.14 × 5.5^2 × 12 = 1139.82(\mathrm{cm}^3)$
$3.14 × 5.5^2 × 12 = 1139.82(\mathrm{cm}^3)$
