6.6×1.9÷6.6×1.9能简便吗
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6.6×1.9÷6.6×1.9
=(6.6÷6.6)×(1.9×1.9)
=1×3.61
=3.61
=(6.6÷6.6)×(1.9×1.9)
=1×3.61
=3.61
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展开全部
6.6×1.9÷6.6×1.9
=6.6÷6.6×1.9×1.9
=1.9×1.9
=(2-0.1)×(核氏镇2-0.1)改粗核核
=2×2-2×2×0.1+0.1×0.1
=4-0.4+0.01
=3.61
=6.6÷6.6×1.9×1.9
=1.9×1.9
=(2-0.1)×(核氏镇2-0.1)改粗核核
=2×2-2×2×0.1+0.1×0.1
=4-0.4+0.01
=3.61
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