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8.6X1.82+7.8Ⅹ0.86
=8.6Ⅹ(1.82+0.78)
=8.6X2.6
=8.6x(3-0.4)
=8.6x3-8.6X0.4
=25.8-3.44
=22.36
=8.6Ⅹ(1.82+0.78)
=8.6X2.6
=8.6x(3-0.4)
=8.6x3-8.6X0.4
=25.8-3.44
=22.36
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展开全部
8.6x1.82+7.8x0.86简便计算
8.6x1.82+7.8x0.86
=8.6x1.82+0.78x8.6
=8.6x(1.82+0.78)
=8.6x2.6
=8.6x2+8.6x0.6
=22.36
8.6x1.82+7.8x0.86
=8.6x1.82+0.78x8.6
=8.6x(1.82+0.78)
=8.6x2.6
=8.6x2+8.6x0.6
=22.36
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=8.6÷10×1.82×10+7.8×0.86
=0.86×18.2+0.86×7.8
=0.86×(18.2+7.8)
=0.86×26
=22.36
=0.86×18.2+0.86×7.8
=0.86×(18.2+7.8)
=0.86×26
=22.36
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