修改时间:2024-07-13 浏览次数:243 类型:期末考试 编辑
× = ×2.4= ÷ = × =
4.5÷ = 20×40%= 1-25%= 8:10=
× = ÷ = 9÷30% = +25%=
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3²-1=8
5²-3²=16
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