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10.4×7×0.35
=（5.2×2）×7×0.35
=7×（2×0.35）×5.2
=7×0.7×5.2
=4.9×5.2
=25.48
=（5.2×2）×7×0.35
=7×（2×0.35）×5.2
=7×0.7×5.2
=4.9×5.2
=25.48
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展开全部
10.4x7x0.35
=10.4x7x0.7x0.5
=10.4x7x0.7/2
=10.4/2x4.9
=5.2x4.9
=5.2x(5-0.1)
=52x(0.5-0.01)
=52/2-0.52
=26-0.52
=25.48
=10.4x7x0.7x0.5
=10.4x7x0.7/2
=10.4/2x4.9
=5.2x4.9
=5.2x(5-0.1)
=52x(0.5-0.01)
=52/2-0.52
=26-0.52
=25.48
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