（1+0.12+0.23）×（0.12+0.23+0.34）﹣（1+0.12+0.23+0.34）×（0.12+0.23）=

66.6×7.6+334×0.24+13.36×38=

998877+988776+887766+877665+776655+766554+665544+655443=

（1×2×3×4×…×9×10×11）÷（28×27×25×24×22）=

1.2345²+0.7655²+2.469×0.7655=

900-153-47=900{#blank#}1{#/blank#}(153+{#blank#}2{#/blank#})

850-327-173=({#blank#}3{#/blank#})-(327{#blank#}4{#/blank#}173)

- - ={#blank#}5{#/blank#} {#blank#}6{#/blank#} ({#blank#}7{#/blank#} {#blank#}8{#/blank#} {#blank#}9{#/blank#})