①9×8=8×{#blank#}1{#/blank#}②125×5×8={#blank#}2{#/blank#}×{#blank#}3{#/blank#}×5
③(40×15)×{#blank#}4{#/blank#}=40×({#blank#}5{#/blank#}×8)
④25×(4×{#blank#}6{#/blank#})=({#blank#}7{#/blank#}×4)×19
⑤2×3×8×5=(3×8)×({#blank#}8{#/blank#}×{#blank#}9{#/blank#})