8.6×75.5-8.6+8.6×25.3
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8.6×75.5-8.6+8.6×25.3
=8.6×75.5-8.6×(0.8+0.2)+8.6×25.3
=8.6×75.5-8.6×0.8+8.6×25.3-8.6×0.2
=8.6×(75.5-0.8+25.3)-8.6×0.2
=8.6×100-1.72
=860-1.72
=858.28
=8.6×75.5-8.6×(0.8+0.2)+8.6×25.3
=8.6×75.5-8.6×0.8+8.6×25.3-8.6×0.2
=8.6×(75.5-0.8+25.3)-8.6×0.2
=8.6×100-1.72
=860-1.72
=858.28
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