登录
一、口算。
$392÷98=$
$0.5×\frac {1}{5}=$
$3.12-2.44=$
$0.93+1.07=$
$\frac {1}{5}+\frac {5}{6}=$
$16.8÷0.8=$
$121×\frac {4}{11}=$
$3-\frac {3}{10}=$
$1-42\% =$
$\frac {3}{8}÷\frac {2}{3}=$
$35÷0.35=$
$\frac {3}{4}×\frac {1}{20}=$
$3.5+0.65=$
$0.25×8=$
$39÷\frac {13}{27}=$
$\frac {3}{2}+\frac {3}{7}=$
$\frac {8}{9}-\frac {3}{4}=$
$\frac {7}{5}÷\frac {7}{15}=$
$\frac {2}{5}×\frac {5}{12}=$
$1-0.37=$
$37.5\% ÷\frac {3}{8}=$
$392÷98=$
4
$0.5×\frac {1}{5}=$
0.1
$3.12-2.44=$
0.68
$0.93+1.07=$
2
$\frac {1}{5}+\frac {5}{6}=$
$\frac{31}{30}$
$16.8÷0.8=$
21
$121×\frac {4}{11}=$
44
$3-\frac {3}{10}=$
$\frac{27}{10}$
$1-42\% =$
0.58
$\frac {3}{8}÷\frac {2}{3}=$
$\frac{9}{16}$
$35÷0.35=$
100
$\frac {3}{4}×\frac {1}{20}=$
$\frac{3}{80}$
$3.5+0.65=$
4.15
$0.25×8=$
2
$39÷\frac {13}{27}=$
81
$\frac {3}{2}+\frac {3}{7}=$
$\frac{27}{14}$
$\frac {8}{9}-\frac {3}{4}=$
$\frac{5}{36}$
$\frac {7}{5}÷\frac {7}{15}=$
3
$\frac {2}{5}×\frac {5}{12}=$
$\frac{1}{6}$
$1-0.37=$
0.63
$37.5\% ÷\frac {3}{8}=$
1
答案
一、4 0.1 0.68
2 $\frac{31}{30}$ 21
44 $\frac{27}{10}$ 0.58
$\frac{9}{16}$ 100 $\frac{3}{80}$
4.15 2 81
$\frac{27}{14}$ $\frac{5}{36}$ 3
$\frac{1}{6}$ 0.63 1
2 $\frac{31}{30}$ 21
44 $\frac{27}{10}$ 0.58
$\frac{9}{16}$ 100 $\frac{3}{80}$
4.15 2 81
$\frac{27}{14}$ $\frac{5}{36}$ 3
$\frac{1}{6}$ 0.63 1
二、计算圆锥的体积。
答案
二、$\frac{1}{3}×3.14×(12.56÷$
3.14÷2$^2$×6=25.12($cm^3$)
$\frac{1}{3}×12.56×9=37.68(cm^3)$
3.14÷2$^2$×6=25.12($cm^3$)
$\frac{1}{3}×12.56×9=37.68(cm^3)$
