一、口算。
$58 + 5 =$ $71 - 8 =$ $34 + 7 + 30 =$
$33 - 6 =$ $92 + 6 =$ $37 - 20 - 8 =$
$24 + 7 =$ $48 - 20 =$ $54 - 7 + 40 =$
$50 - 4 =$ $9 + 76 =$ $62 + 30 - 50 =$
$67 + 6 =$ $37 - 8 =$ $25 - 6 + 80 =$
$45 - 8 =$ $46 + 50 =$ $5 + 66 + 20 =$
$33 + 7 =$ $35 - 9 =$ $43 - 8 + 30 =$
$91 - 30 =$ $37 + 7 =$ $7 + 35 + 9 =$
$9 + 28 =$ $10 + 64 =$ $62 - 7 - 6 =$
$82 - 5 =$ $74 - 50 =$ $41 + 50 - 3 =$

一、63 63 71
27 98 9
31 28 87
46 85 42
73 29 99
37 96 91
40 26 65
61 44 51
37 74 49
77 24 88

二、在$◯$里填“＞”“＜”或“=”。
$42◯45 - 30$ $53 - 4◯63 - 4$ $56 - 9◯59 - 6$
$31 + 20◯55$ $30 - 5◯40 - 5$ $49 + 6◯59 - 4$
$60◯62 - 7$ $27 - 4◯19 + 3$ $41 - 2◯41 - 20$

二、＞ ＜ ＜
＜ ＜ =
＞ ＞ ＞