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6.25×1.9
=6.25x(2-0.1)
=6.25x2-6.25x0.1
=12.5-0.625
=11.875
=6.25x(2-0.1)
=6.25x2-6.25x0.1
=12.5-0.625
=11.875
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展开全部
6.25×1.9
=6.25×(2-0.1)
=6.25×2-6.25×0.1
=12.5-0.625
=11.875
=6.25×(2-0.1)
=6.25×2-6.25×0.1
=12.5-0.625
=11.875
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展开全部
6.25x1.9
=6.25x2-6.25x0.1
=12.5-0.625
=12.5-1+0.375
=11.875
=6.25x2-6.25x0.1
=12.5-0.625
=12.5-1+0.375
=11.875
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