一、口算。
$11 - 4 =$ $60 + 7 =$ $35 - 30 + 7 =$
$17 - 8 =$ $67 - 7 =$ $8 + 10 - 9 =$
$27 - 20 =$ $90 + 5 =$ $13 - 4 - 2 =$
$7 + 5 =$ $80 - 60 =$ $9 + 4 - 7 =$
$14 - 5 =$ $40 + 7 =$ $36 - 6 + 30 =$
$90 - 40 =$ $20 + 70 =$ $9 + 70 - 9 =$
$15 - 7 =$ $74 - 70 =$ $15 - 8 + 9 =$
$16 - 8 =$ $5 + 30 =$ $17 - 7 - 2 =$
$7 + 6 =$ $89 - 80 =$ $76 - 6 - 20 =$
$12 - 3 =$ $6 + 50 =$ $63 - 60 + 8 =$

一、7 67 12
9 60 9
7 95 7
12 20 6
9 47 60
50 90 70
8 4 16
8 35 8
13 9 50
9 56 11

二、在$◯$里填“＞”“＜”或“=”。
$4 + 90◯9 + 40$ $50 + 40◯60 + 30$ $18 - 9◯17 - 9$
$60 + 8◯80 - 30$ $24 - 20◯14 - 4$ $13 - 6◯67 - 60$
$56 - 6 + 5◯55$ $40◯14 - 5 + 30$ $66 - 6 + 8◯70$

二、＞ = ＞
＞ ＜ =
= ＞ ＜