一、口算。
$64 + 8 =$
$48 - 40 =$
$8 + 7 =$
$90 - 9 =$
$20 + 60 =$
$35 - 6 =$
$6 + 8 =$
$90 - 50 =$
$10 + 39 =$
$72 - 8 =$
$64 + 8 =$
72
$71 - 6 =$65
$77 + 20 =$97
$48 - 40 =$
8
$73 + 8 =$81
$72 - 6 =$66
$8 + 7 =$
15
$74 - 50 =$24
$9 + 39 =$48
$90 - 9 =$
81
$6 + 76 =$82
$83 - 60 =$23
$20 + 60 =$
80
$53 - 40 =$13
$47 + 7 =$54
$35 - 6 =$
29
$30 + 56 =$86
$82 - 8 =$74
$6 + 8 =$
14
$15 - 8 =$7
$45 + 8 =$53
$90 - 50 =$
40
$40 + 58 =$98
$91 - 8 =$83
$10 + 39 =$
49
$58 - 20 =$38
$46 + 7 =$53
$72 - 8 =$
64
$34 + 30 =$64
$65 - 60 =$5
答案
周一
一、72 65 97
8 81 66
15 24 48
81 82 23
80 13 54
29 86 74
14 7 53
40 98 83
49 38 53
64 64 5
一、72 65 97
8 81 66
15 24 48
81 82 23
80 13 54
29 86 74
14 7 53
40 98 83
49 38 53
64 64 5
二、连一连。

答案
二、
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