626－315={#blank#}1{#/blank#}            487－63={#blank#}2{#/blank#}

457+{#blank#}4{#/blank#}=654           {#blank#}5{#/blank#}+261=975        618-{#blank#}6{#/blank#}=256

{#blank#}7{#/blank#}-258=159           246+{#blank#}8{#/blank#}=589         {#blank#}9{#/blank#}+148=742

512-{#blank#}10{#/blank#}=259           {#blank#}11{#/blank#}-201=125         456+{#blank#}12{#/blank#}=545

{#blank#}13{#/blank#}+325=561           641-{#blank#}14{#/blank#}=365         {#blank#}15{#/blank#}-158=369

27-356>200，里最小填{#blank#}2{#/blank#}。