魔术师的三角(从上到下填)

和为12

11-5=1+{#blank#}1{#/blank#}            13-9=3+{#blank#}2{#/blank#} 

14-4-5={#blank#}3{#/blank#}            18-6-4={#blank#}4{#/blank#}

2+4+4=                   18-8-3=               9-5+8=

7+9-6=                   10-3+9=               6+8+4=

14-4-5=                   8+7-5=                9+4-2=

2+9{#blank#}1{#/blank#}12      15-2-3{#blank#}2{#/blank#}10        8-3{#blank#}3{#/blank#}8+3

9-1{#blank#}4{#/blank#}7           7+4{#blank#}5{#/blank#}7+5        6+0{#blank#}6{#/blank#}6-0