346+51{#blank#}1{#/blank#}264+151        551+193{#blank#}2{#/blank#}738+49   

375+416{#blank#}3{#/blank#}428+258       252+492{#blank#}4{#/blank#}345+248 

273+346{#blank#}5{#/blank#}523+180       651+85{#blank#}6{#/blank#}285+451

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

753＋826={#blank#}1{#/blank#}

376-{#blank#}1{#/blank#}=234          {#blank#}2{#/blank#}-326=157

87+{#blank#}3{#/blank#}=564           {#blank#}4{#/blank#}+156=533

①629+549=

②800－364= 

③64÷4=

④ 406×5=

⑤ 63÷7=

⑥ 421×4=

⑦ 621－81=

⑧ 925+456=