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一、口算。
$150÷10\% =$
$\frac {9}{20}-\frac {7}{30}=$
$7×60\% =$
$9.56+0.8=$
$720÷24=$
$\frac {9}{10}-\frac {7}{15}=$
$0.5×4.4=$
$6.5×60\% =$
$\frac {7}{9}+\frac {1}{3}=$
$\frac {3}{4}÷\frac {8}{9}=$
$\frac {1}{8}÷\frac {1}{10}=$
$3.3-0.27=$
$\frac {4}{3}-\frac {1}{22}=$
$25.2÷0.9=$
$\frac {7}{8}×\frac {4}{35}=$
$\frac {3}{8}×80\% =$
$2.4-2.25=$
$\frac {3}{14}÷\frac {6}{7}=$
$\frac {6}{25}+\frac {2}{5}=$
$63÷\frac {3}{7}=$
$\frac {8}{7}×\frac {13}{14}=$
$150÷10\% =$
1500
$\frac {9}{20}-\frac {7}{30}=$
$\dfrac{13}{60}$
$7×60\% =$
4.2
$9.56+0.8=$
10.36
$720÷24=$
30
$\frac {9}{10}-\frac {7}{15}=$
$\dfrac{13}{30}$
$0.5×4.4=$
2.2
$6.5×60\% =$
3.9
$\frac {7}{9}+\frac {1}{3}=$
$\dfrac{10}{9}$
$\frac {3}{4}÷\frac {8}{9}=$
$\dfrac{27}{32}$
$\frac {1}{8}÷\frac {1}{10}=$
$\dfrac{5}{4}$
$3.3-0.27=$
3.03
$\frac {4}{3}-\frac {1}{22}=$
$\dfrac{85}{66}$
$25.2÷0.9=$
28
$\frac {7}{8}×\frac {4}{35}=$
$\dfrac{1}{10}$
$\frac {3}{8}×80\% =$
$\dfrac{3}{10}$
$2.4-2.25=$
0.15
$\frac {3}{14}÷\frac {6}{7}=$
$\dfrac{1}{4}$
$\frac {6}{25}+\frac {2}{5}=$
$\dfrac{16}{25}$
$63÷\frac {3}{7}=$
147
$\frac {8}{7}×\frac {13}{14}=$
$\dfrac{52}{49}$
答案
一、1500 $\dfrac{13}{60}$ 4.2
10.36 30 $\dfrac{13}{30}$
2.2 3.9 $\dfrac{10}{9}$
$\dfrac{27}{32}$ $\dfrac{5}{4}$ 3.03
$\dfrac{85}{66}$ 28 $\dfrac{1}{10}$
$\dfrac{3}{10}$ 0.15 $\dfrac{1}{4}$
$\dfrac{16}{25}$ 147 $\dfrac{52}{49}$
10.36 30 $\dfrac{13}{30}$
2.2 3.9 $\dfrac{10}{9}$
$\dfrac{27}{32}$ $\dfrac{5}{4}$ 3.03
$\dfrac{85}{66}$ 28 $\dfrac{1}{10}$
$\dfrac{3}{10}$ 0.15 $\dfrac{1}{4}$
$\dfrac{16}{25}$ 147 $\dfrac{52}{49}$
二、计算圆柱的表面积。
答案
二、3.14×(5÷2)²×2+3.14×5×6.4=139.73(dm²)
3.14×(37.68÷3.14÷2)²×2+37.68×4.5=395.64(cm²)
3.14×(37.68÷3.14÷2)²×2+37.68×4.5=395.64(cm²)
