《2025年口算训练六年级数学下册北师大版升级版》

初出茅庐
$2:x = 4:18$ $x =$
$25:x = \frac{1}{4}:4$ $x =$
$1.8:x = 9:1$ $x =$
$0.6:\frac{4}{5} = x:15$ $x =$
$2\frac{1}{3}:7 = x:33$ $x =$
$0.4:4.8 = x:12$ $x =$

答案：

过关斩将
$24:27 =$
$4.9:0.7 =$
$0.875:7 =$
$3.6:1.2 =$
$1.01:101 =$
$0.32:5.6 =$
$\frac{1}{9}:\frac{5}{3} =$
$\frac{1}{3}:\frac{3}{4} =$
$\frac{4}{5}:\frac{3}{10} =$
$\frac{2}{3}:\frac{9}{10} =$
$45分:2.5时 =$
$400mL:3L =$
$30分:1.5时 =$
$15t:400kg =$
$25cm:12m =$

答案：

某工程队修一条路，4天修了2400 m，正好是全长的40%。照这样计算，修完这条路还要多少天？

答案：