试题 试卷
题型：计算题 题类：常考题 难易度：普通
4+8+16=16×2﹣4=28
4+8+16+32=32×2﹣4=60
4+8+16+32+64=64×2﹣4=124
4+8+16+32+…+256={#blank#}1{#/blank#}
a+2a+4a+8a+16a+…+1024a={#blank#}2{#/blank#}
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#})
试题篮
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={#blank#}5{#/blank#} {#blank#}6{#/blank#} ({#blank#}7{#/blank#} {#blank#}8{#/blank#} {#blank#}9{#/blank#})