一、口算。
37 - 8 =
4 + 7 =
90 - 9 - 40 =
68 + 7 =
65 - 60 =
9 + 9 + 80 =
14 - 7 =
50 + 34 =
40 + 42 - 5 =
55 + 8 =
61 - 4 =
5 + 30 + 5 =
43 - 7 =
20 + 65 =
48 + 7 - 8 =
30 + 27 =
76 - 9 =
67 - 7 + 20 =
80 - 40 =
28 + 9 =
80 + 3 - 7 =
34 + 7 =
80 - 6 =
70 - 3 + 30 =
30 - 5 =
54 + 6 =
60 + 17 - 50 =
25 + 8 =
83 - 5 =
9 + 27 + 9 =

一、29 11 41
75 5 98
7 84 77
63 57 40
36 85 47
57 67 80
40 37 76
41 74 97
25 60 27
33 78 45

二、在$◯$里填“＞”“＜”或“=”。
90 - 7$◯$91 - 8
29 + 2$◯$43 - 6
61 - 4$◯$58 + 7
42 - 9$◯$29 + 4
29 + 3$◯$58 - 20
39 + 7$◯$59 - 3

二、= ＜
＜ =
＜ ＜