12+88={#blank#}1{#/blank#}       25×8={#blank#}2{#/blank#}        396-28-22={#blank#}3{#/blank#}         1000÷125={#blank#}4{#/blank#}

65+35={#blank#}5{#/blank#}       8×125={#blank#}6{#/blank#}       235-（35+37）={#blank#}7{#/blank#}    125×37×8={#blank#}8{#/blank#}

37+63+98={#blank#}9{#/blank#}   23×99+23={#blank#}10{#/blank#}   480-101={#blank#}11{#/blank#}           598+99={#blank#}12{#/blank#}

26.4×1.08{#blank#}1{#/blank#}26.4              598÷23{#blank#}2{#/blank#}5.98÷2.3

49.5÷1.1{#blank#}3{#/blank#}49.5                 7.1÷0.25{#blank#}4{#/blank#}7.1×4