以内-加减法口算题-逆向思维题

20= 3-( ) 16 = ( )+0 15 = 3+( ) 12 = 8-( ) 13 = 10

18 = 20 = 13 = 20 = 16 = 24 = 12 = ( )-7 26 3+( ) ( )-3 17 ( ) -3 4+( ) 10-( ) 5-( ) 22 = ( )+5 19 = 5+( ) = 7-( ) 128 = 11 = ( )-9 12 = 9-( ) = ( )-4 20 = ( )-1 12 = 25-( ) 18 = ( ) -3 4+( ) 10 = 9-( ) 19 = 2+( ) 17 = ( )-2 15 = ( )-3 19 = 6+( ) 20 = ( )-0 13 = ( ) +3 10 = ( )-3 15 = 30-( ) 14 = ( )+1 26 = (

11 = (

21 = (

12 = 3-

18 = (

21 = 25

19 = (

1

24 = 7+( ) 17 = ( )+5 27 = 27-( ) 20 = 1+( ) 17 = (

22 = ( )-6 20 = 6+( ) 17 = 5+( ) 16 = ( )-3 20 = 4+

14 = 23 = 18 = 15 = 19 = 13 = 27 = 2

( )+2 10-( ) ( )-1 11 ( )-5 12 4+( ) ( )-7 18 ( )+6 17 = 5+( ) 20 = ( )-3 = 6-( ) = 8-( ) 13 = 20-( ) = ( )+9 20 = 10+( ) 20 = 4+( ) 17 = ( )+6 16 = 14+( ) 13 = ( )-4 15 = 20-( ) 19 = ( )+3 21 = ( )-9 25 = 9-( ) 12 = 6-( ) 22 = ( )-7 15 = ( )-7 19 = 8+( ) 11 = ( )-6 20 = 0-( ) 20 = (

20 = (

14 = 16

18 = (

14 = 4+

25 = (

15 = (

18 = 9-( ) 25 = ( )-3 18 = 14+( ) 15 = ( )+0 17 = (

20 = 10+( ) 18 = 20-( ) 23 = 14+( ) 18 = 5+( ) 24 = 7-

19 = 28 = 16 = 20 = 15 = 28 = 18 = 3

( )+6 9+( ) ( )-0 14 ( )+7 9+( ) ( )+7 1+( ) 20 = ( )+6 27 = ( )-2 = ( )-3 26 = 2+( ) 11 = ( )-5 16 = 27-( ) 15 = 20-( ) 17 = ( )-2 10 = 19-( ) 19 = 22+( ) 14 = ( )-3 21 = ( )-9 18 = 7+( ) 24 = ( )-6 20 = ( )+8 20 = 5+( ) 14 = ( )-5 22 = 8-( ) 17 = ( )+1 27 = ( )+2 14 = 9-( ) 17 = (

20 = (

15 = (

29 = (

13 = (

27 = 9-

18 = (

20 = 6+( ) 15 = 19-( ) 14 = 20-( ) 17 = 6+( ) 21 = 9-

15 = ( )-5 14 = 3+( ) 12 = ( )-7 10 = ( )-7 12 = 10

4