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20以内加减法口算题
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9-0= 20-0= 9+2= 16-8= 10+( )=14
10+6= 17-4= 17-9= 11-7= ( )-4=13
10+8= 15-4= 15-8= 12-9= ( )-9=3
16-2= 13+3= 6+7= 15-8= 17-( )=4
11+2= 19-8= 11-5= 13-7= 13+( )=19
15-1= 15-2= 9+5= 12-4= ( )-4=8
11+7= 11+8= 18-9= 16-7= 15-( )=6
11+9= 17-3= 12-4= 7+4= 13-( )=5
12+8= 13+1= 9+7= 6+6= ( )+3=12
18+1= 13+5= 8+6= 13-4= ( )+5=18
19-5= 14+5= 5+6= 16-9= ( )-7=7
15+1= 15+2= 15-9= 14-5= 16+( )=19
12+3= 16+2= 16-9= 3+8= 12-( )=3
16+4= 17+1= 9+8= 18-9= 13-( )=7
20+0= 3+14= 14-7= 12-9= 15+( )=19
19-4= 19-9= 12-7= 5+8= ( )-5=8
12+6= 6+12= 17-8= 16-9= 12+( )=17
3+5 = 4+12= 6+7= 12-9= 19-( )=10
10+4= 6+4= 14-5= 11-9= 8+( )=16
18-4= 19-9= 7+7= 15-6= ( )-9=4
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