计算．(得数保留两位小数)

2.3+3.57=    199-65=    o.8×0.9=       12×( × )=

1- =         ÷ =    3.2÷0.4=        

4.6＋2.4=       7.5－5=         0.6+0.2=        2.5×0.4=

9.2－1.2=       0.8×0.4=        4×0.2=          4.2+0.1=

0.72+8=        0.3×0.3=        0.12×0.4=       0.4×100=

0.7×0.9=       0.14×0.3=      3.2×0.3=      60×0.5=

0.16×0.5=      7×0.08=        1.8×0.4=       0.24×3=

756×0.9{#blank#}1{#/blank#}756            4.25×1.1{#blank#}2{#/blank#} 4.25

1.96÷0.99{#blank#}3{#/blank#}1.96         4.4÷1.8{#blank#}4{#/blank#}4.4