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一、口算。
$35 - 30 =$ $6 + 40 =$ $60 + 7 =$
$5 + 5 =$ $12 - 7 =$ $96 - 90 =$
$17 - 8 =$ $5 + 60 =$ $20 + 20 =$
$7 + 9 =$ $11 - 8 =$ $12 - 8 =$
$85 - 5 =$ $70 + 10 =$ $9 + 6 =$
$30 + 8 =$ $86 - 80 =$ $17 - 7 =$
$30 - 20 =$ $5 + 50 =$ $8 + 4 =$
$6 + 5 =$ $44 - 4 =$ $98 - 8 =$
$15 - 6 =$ $90 - 50 =$ $6 + 70 =$
$20 + 9 =$ $6 + 8 =$ $63 - 60 =$
$35 - 30 =$ $6 + 40 =$ $60 + 7 =$
$5 + 5 =$ $12 - 7 =$ $96 - 90 =$
$17 - 8 =$ $5 + 60 =$ $20 + 20 =$
$7 + 9 =$ $11 - 8 =$ $12 - 8 =$
$85 - 5 =$ $70 + 10 =$ $9 + 6 =$
$30 + 8 =$ $86 - 80 =$ $17 - 7 =$
$30 - 20 =$ $5 + 50 =$ $8 + 4 =$
$6 + 5 =$ $44 - 4 =$ $98 - 8 =$
$15 - 6 =$ $90 - 50 =$ $6 + 70 =$
$20 + 9 =$ $6 + 8 =$ $63 - 60 =$
答案
一、5 46 67
10 5 6
9 65 40
16 3 4
80 80 15
38 6 10
10 55 12
11 40 90
9 40 76
29 14 3
10 5 6
9 65 40
16 3 4
80 80 15
38 6 10
10 55 12
11 40 90
9 40 76
29 14 3
二、填一填，使每张卡片上算式的得数都相等。
答案
二、39 40 8
2 11 3
8+1 10-2 4+9
（最后一行算式答
案不唯一）
2 11 3
8+1 10-2 4+9
（最后一行算式答
案不唯一）
