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孙女七岁半,学前练脑算。爷爷年过半,理财用珠算。孙女提挑战,爷俩比比看。奶奶当裁判,
Seven and a half granddaughter, pre-school practice brain count. Grandpa more than half, with financial calculations. Granddaughter challenges, the two look at Bibi. Grandma when the referee,