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一、填空題
5 ( ) 15 ( ) 25 30 ( ) ( )
2 ( ) 6 8 ( ) ( ) 14 ( )
10( ) 30 ( ) 50 60 ( ) ( ) ( ) 100
二、分成
10 18 20 17 15 14 13
/\ /\ /\ /\ /\ /\ /\
5 ( ) ( ) 8 10 ( ) 7 ( ) 10 ( ) ( ) 7 9 ( )
12 11 16 19 10 18 15
/\ /\ /\ /\ /\ /\ /\
( )2 1 ( ) 8 ( ) ( ) 9 5 ( ) 9 ( ) 6 ( )
三、判斷對錯(對的打,錯的打 )
20 - 0 = 20 ( ) 5 + 15 = ( ) 10 + 5 =10 ( )
18 +2 = 20( ) 7 +7 =15( ) 10 + 10 =18( )
20 -10=10( ) 10 - 0 =0( ) 6 + 14=20( )
7 + 13=10( ) 4 - 1 =4( ) 2 + 3=5( )