一、口算。
$16 + 6 =$ $50 - 3 =$ $72 - 9 - 30 =$
$81 - 4 =$ $75 + 20 =$ $38 + 7 - 20 =$
$72 + 8 =$ $80 - 7 =$ $56 - 8 + 5 =$
$80 - 10 =$ $7 + 27 =$ $43 + 8 + 40 =$
$59 + 5 =$ $65 - 60 =$ $93 - 4 - 60 =$
$43 - 6 =$ $58 + 8 =$ $22 + 9 + 30 =$
$3 + 47 =$ $50 - 5 =$ $61 - 40 - 2 =$
$55 - 30 =$ $17 + 5 =$ $34 + 60 - 8 =$
$64 + 7 =$ $43 - 7 =$ $41 - 5 - 9 =$
$52 - 40 =$ $46 + 8 =$ $18 + 4 + 50 =$

一、22 47 33
77 95 25
80 73 53
70 34 91
64 5 29
37 66 61
50 45 19
25 22 86
71 36 27
12 54 72

二、走迷宫。

二、23 30 37 44
72 64 56 48