一、口算。
$32 + 29 =$ $7×7 =$ $27÷3 =$
$2×9 =$ $50 - 28 =$ $18÷2 =$
$43 + 48 =$ $4×4 =$ $52÷7 =$
$5×9 =$ $46 - 29 =$ $58÷8 =$
$51 - 17 =$ $8×6 =$ $37÷5 =$
$2×7 =$ $25 + 49 =$ $32÷8 =$
$75 - 46 =$ $3×3 =$ $44÷7 =$
$5×6 =$ $35 + 33 =$ $36÷6 =$
$80 - 42 =$ $6×9 =$ $28÷4 =$
$2×8 =$ $66 - 38 =$ $56÷9 =$

一、61 49 9
18 22 9
91 16 7······3
45 17 7······2
34 48 7······2
14 74 4
29 9 6······2
30 68 6
38 54 7
16 28 6······2

二、选择合适的答案，在$□$里画“√”。

二、