一、口算。
$9 + 4 =$ $60 + 3 =$ $3 + 3 + 30 =$
$6 + 8 =$ $54 - 4 =$ $49 - 40 + 7 =$
$13 - 5 =$ $70 + 5 =$ $15 - 8 + 20 =$
$5 + 6 =$ $60 + 30 =$ $87 - 80 + 3 =$
$16 - 8 =$ $44 - 40 =$ $9 + 3 - 5 =$
$7 + 7 =$ $63 - 3 =$ $18 - 8 - 3 =$
$8 + 3 =$ $90 - 80 =$ $55 - 5 - 30 =$
$14 - 8 =$ $5 + 30 =$ $20 - 10 + 70 =$
$14 - 6 =$ $77 - 70 =$ $6 + 7 - 8 =$
$6 + 7 =$ $10 + 50 =$ $23 - 20 + 8 =$

一、13 63 36
14 50 16
8 75 27
11 90 10
8 4 7
14 60 7
11 10 20
6 35 80
8 7 5
13 60 11

二、在$◯$里填“＞”“＜”或“=”。
$80 - 70◯9$ $15 - 8◯8$ $22 - 2◯12$
$13 - 7◯8$ $56 - 50◯11$ $17 - 8◯7$
$10 + 8◯9$ $16 - 7◯8$ $10 + 40◯50$

二、＞ ＜ ＞
＜ ＜ ＞
＞ ＞ =