0.4×0.4={#blank#}1{#/blank#}    7.8×100={#blank#}2{#/blank#}    0.14×0.2={#blank#}3{#/blank#}

0.04×2.1={#blank#}4{#/blank#}    5.3×0.1={#blank#}5{#/blank#}    0.6×0.03={#blank#}6{#/blank#}

0.3×0.8={#blank#}7{#/blank#}    0.42×10={#blank#}8{#/blank#}    0.04×0.6={#blank#}9{#/blank#}

0.6 5=                0.3 2=                5.1 4=

1.2 6=                0.7 9=                0.6 8=

1.3 3=                2.5 4=                1.1 9=

10.5÷[0.5×（1.9+2.3）]            2.5×0.8×4×12.5               4.7×1.1+11×0.53