题目内容
|
( 1) |
( 2) |
( 3) |
|
40-20= ( ) |
30-10= ( ) |
50-10= ( ) |
|
90-50= ( ) |
70-20= ( ) |
60-30= ( ) |
|
80-60= ( ) |
100-20= ( ) |
100-60= ( ) |
答案:20,40,20;20,50,80;40,30,40
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