63.4×5.7+6.34×41+0.634×20怎么拿简便方法计算？
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63.4×5.7+6.34×41+0.634×20
=6.34×5.7×10+6.34×41+6.34×20÷10
=6.34×57+6.34×41+6.34×2
=6.34×（57+41+2）
=6.34×100
=634
=6.34×5.7×10+6.34×41+6.34×20÷10
=6.34×57+6.34×41+6.34×2
=6.34×（57+41+2）
=6.34×100
=634
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