6.28×(-23.3)-3.14×35.2-1.57×36.4这题怎样简便运算?
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6.28×(-23.3)-3.14×35.2-1.57×36.4这题怎样简便运算?
![6.28×(-23.3)-3.14×35.2-1.57×36.4这题怎样简便运算?](/uploads/image/z/7538441-41-1.jpg?t=6.28%C3%97%EF%BC%88%EF%BC%8D23.3%EF%BC%89%EF%BC%8D3.14%C3%9735.2%EF%BC%8D1.57%C3%9736.4%E8%BF%99%E9%A2%98%E6%80%8E%E6%A0%B7%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%3F)
6.28×(-23.3)-3.14×35.2-1.57×36.4
=3.14×2×(-23.3)-3.14×35.2-3.14÷2×36.4
=-3.14×(23.3×2+35.2+36.4÷2)
=-3.14×(46.6+35.2+18.2)
=-3.14×100
=-314
=3.14×2×(-23.3)-3.14×35.2-3.14÷2×36.4
=-3.14×(23.3×2+35.2+36.4÷2)
=-3.14×(46.6+35.2+18.2)
=-3.14×100
=-314
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