7+9={#blank#}1{#/blank#}，16-9={#blank#}2{#/blank#}，16-7={#blank#}3{#/blank#}

10-5=           6-4=             7-3=              8-2=

9-0=            9-4=              8-5=             7-6=

10-5=           6-0=              8-2=             7-3=

5-1=            6-0=              4-2=             6-3=

7-6=            5-4=              2-0=             9-6=

16{#blank#}1{#/blank#}3=13         6{#blank#}2{#/blank#}6=12        8{#blank#}3{#/blank#}7<9          11{#blank#}4{#/blank#}2>12