一、算一算。
$65 - 30 - 2 =$
$21 + 70 - 1 =$
$48 - 8 + 21 =$
$54 - 50 + 5 =$
$36 + 40 - 20 =$
$78 - 70 - 8 =$
$36 + 6 - 7 =$
$90 - 60 + 3 =$
$40 + 7 + 20 =$
$65 - 30 - 2 =$
$21 + 70 - 1 =$
$48 - 8 + 21 =$
$54 - 50 + 5 =$
$36 + 40 - 20 =$
$78 - 70 - 8 =$
$36 + 6 - 7 =$
$90 - 60 + 3 =$
$40 + 7 + 20 =$
答案
65 - 30 - 2 = 33
21 + 70 - 1 = 90
48 - 8 + 21 = 61
54 - 50 + 5 = 9
36 + 40 - 20 = 56
78 - 70 - 8 = 0
36 + 6 - 7 = 35
90 - 60 + 3 = 33
40 + 7 + 20 = 67
21 + 70 - 1 = 90
48 - 8 + 21 = 61
54 - 50 + 5 = 9
36 + 40 - 20 = 56
78 - 70 - 8 = 0
36 + 6 - 7 = 35
90 - 60 + 3 = 33
40 + 7 + 20 = 67
二、看图,填一填,算一算。

答案
```
2 2
+ (17)
------
(39)
(51)
1 1
------
(40)
```
2 2
+ (17)
------
(39)
(51)
1 1
------
(40)
```
三、小蜜蜂采花蜜。(连一连)

答案
34+5=39
43+3=46
26+40=66
58-20=38
63-30=33
连线对应:
34+5 连 39
43+3 连 46
26+40 连 66
58-20 连 38
63-30 连 33
43+3=46
26+40=66
58-20=38
63-30=33
连线对应:
34+5 连 39
43+3 连 46
26+40 连 66
58-20 连 38
63-30 连 33
四、照样子,填数。

答案
16、37、8、34、70
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