一、口算。
$60 - 33 =$ $11×4 =$ $70÷8 =$
$10×7 =$ $82÷2 =$ $23×3 =$
$90÷3 =$ $27 + 66 =$ $68÷2 =$
$5×5 =$ $48÷4 =$ $55÷7 =$
$63÷9 =$ $23×2 =$ $62÷2 =$
$61 - 35 =$ $30×2 =$ $44÷7 =$
$88÷4 =$ $46÷2 =$ $41×2 =$
$7×7 =$ $24÷2 =$ $66÷3 =$
$37 + 29 =$ $43×2 =$ $20÷7 =$
$63 - 38 =$ $12×3 =$ $93÷3 =$

一、27 44 8……6
70 41 69
30 93 34
25 12 7……6
7 46 31
26 60 6……2
22 23 82
49 12 22
66 86 2……6
25 36 31

二、先写出算盘上表示的数，再比较大小。

二、5306＞1406
6155＜6244
4050＞4005
5114＞4999