4.38÷0.5{#blank#}1{#/blank#}4.38；    3.6×0.4{#blank#}2{#/blank#}3.6；   3.2×100{#blank#}3{#/blank#}3.2÷0.01．

0.58×0.99{#blank#}1{#/blank#}0.58           0.84{#blank#}2{#/blank#}0.84÷0.35

10.3÷3.35{#blank#}3{#/blank#}10.3           6.79×2.65{#blank#}4{#/blank#}2.65

× {#blank#}1{#/blank#}             ÷ {#blank#}2{#/blank#}

÷ {#blank#}3{#/blank#}             6× {#blank#}4{#/blank#}6÷

× {#blank#}5{#/blank#}            （48+12）× {#blank#}6{#/blank#}48+12×