《2025年口算训练六年级数学下册北师大版升级版》

初出茅庐
$\frac{3}{4}+\frac{5}{6}=$
$\frac{4}{7}-\frac{1}{14}=$
$\frac{3}{8}+\frac{3}{10}=$
$\frac{5}{9}\times\frac{3}{20}=$
$125\times\frac{8}{25}=$
$\frac{5}{8}\div\frac{5}{16}=$
$\frac{3}{7}\div\frac{5}{14}=$
$\frac{16}{81}\div\frac{8}{9}=$
$\frac{3}{22}\div\frac{6}{11}=$

答案：

过关斩将
$324 + 146 + 207 =$
$1430 - 320 - 75 =$
$320\times20\div80 =$
$2000 - 198 + 2 =$
$2000 - (198 + 2) =$
$2.7 + 6.3\div0.9 =$
$(2.7 + 6.3)\div0.9 =$
$7.2\div6\times0.5 =$
$7.2\div(6\times0.5) =$
$7\div\frac{1}{3}\times\frac{1}{6} =$
$7\div\frac{1}{3}\div\frac{1}{6} =$
$7\div(\frac{1}{3}\div\frac{1}{6}) =$
$\frac{5}{8}\div\frac{5}{8}+\frac{1}{2} =$
$\frac{5}{8}\div(\frac{5}{8}+\frac{1}{2}) =$
$\frac{5}{8}+\frac{5}{8}\div\frac{1}{2} =$
$3\frac{3}{4}+2.25 =$
$\frac{1}{4}+7\div28 =$
$\frac{5}{7}\times3.14 + 3.14\times1\frac{2}{7} =$
$(\frac{5}{6}-\frac{1}{5})\times30 =$
$8\div\frac{4}{9} =$
$\frac{3}{8}\times7\div\frac{3}{8}\times7 =$

答案：

甲数除以乙数的商是8，余数是5，若甲、乙两数同时扩大到原来的10倍，那么余数( )。
A. 不变
B. 是50
C. 是0.5
D. 是500

答案：