一、口算。
$6 + 6 =$ $13 - 9 =$ $10 - 8 + 7 =$
$12 - 7 =$ $7 + 9 =$ $5 + 7 - 4 =$
$4 + 12 =$ $14 - 5 =$ $16 - 3 - 5 =$
$11 - 8 =$ $12 + 2 =$ $14 - 9 + 6 =$
$7 + 13 =$ $17 - 7 =$ $7 + 7 - 6 =$
$18 - 7 =$ $1 + 14 =$ $3 + 5 + 4 =$
$8 + 9 =$ $15 - 7 =$ $16 - 10 + 8 =$
$13 - 8 =$ $8 + 3 =$ $12 - 8 + 7 =$
$5 + 8 =$ $15 - 6 =$ $18 - 2 - 9 =$
$19 - 8 =$ $5 + 7 =$ $8 + 7 - 8 =$

一、12 4 9
5 16 8
16 9 8
3 14 11
20 10 8
11 15 12
17 8 14
5 11 11
13 9 7
11 12 7

二、在$◯$里填“＞”“＜”或“=”。
$7 + 12◯19 - 1$ $14 - 7◯14 - 8$ $13 + 4◯13 - 4$
$13 - 8◯4 + 4$ $17 - 9◯16 - 8$ $14 - 6◯12 - 6$
$18 - 5◯5 + 9$ $15 + 4◯14 + 5$ $16 - 9◯19 - 6$

二、＞ ＞ ＞
＜ = ＞
＜ = ＜