一、口算。
$62 - 36 =$ $3×7 =$ $42÷2 =$
$20×2 =$ $18÷9 =$ $33÷6 =$
$55 + 28 =$ $13×2 =$ $66÷6 =$
$21×4 =$ $86÷2 =$ $93÷3 =$
$6×6 =$ $23×3 =$ $62÷8 =$
$70 - 55 =$ $12×4 =$ $36÷3 =$
$81÷9 =$ $31×3 =$ $64÷2 =$
$10×9 =$ $80÷4 =$ $55÷9 =$
$29 + 37 =$ $11×4 =$ $48÷4 =$
$34×2 =$ $20×3 =$ $40÷6 =$

一、26 21 21
40 2 5……3
83 26 11
84 43 31
36 69 7……6
15 48 12
9 93 32
90 20 6……1
66 44 12
68 60 6……4

二、在$◯$里填“＞”或“＜”。
$2989◯3001$ $998◯1000$ $3572◯3699$
$5350◯5530$ $8306◯8630$ $6435◯6345$
$7630◯7603$ $5001◯4990$ $6205◯6199$
$6608◯6806$ $8898◯8900$ $7286◯7268$
$8226◯8622$ $9966◯6699$ $9090◯9009$

二、＜ ＜ ＜
＜ ＜ ＞
＞ ＞ ＞
＜ ＜ ＞
＜ ＞ ＞