从上到下，从左到右在空格中填上合适的数．

17－5={#blank#}1{#/blank#}

1+4=          7-2=          5+3=          10-1=

7+3=          8+6=          9-3=          15-2=

2+6=          4+8=          7-0=          6+5=

7-4=          4-1=          3+6=          10-6=

5+9=          12+2=          7-5=          8-7=

7+5=          14-4=          9-4=          3+13=

5+5=          6+6=          7+4=          8-2=

4+11=        10+8=         10-7=          6+7=

18-4=          7+7=          3+9=          11+6=

7+{#blank#}1{#/blank#}=11      15=12+{#blank#}2{#/blank#}      19-{#blank#}3{#/blank#}=10     9+{#blank#}4{#/blank#}>16