36×2.9+3.6×54+0.36×170简便运算?
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解:36×2.9+3.6×54+0.36×170
=3.6×10×2.9+3.6×54+3.6×0.1×170
=3.6×(10×2.9)+3.6×54+3.6×(0.1×170)
=3.6×29+3.6×54+3.6×17
=3.6×(29+54+17)
=3.6×100
=360
=3.6×10×2.9+3.6×54+3.6×0.1×170
=3.6×(10×2.9)+3.6×54+3.6×(0.1×170)
=3.6×29+3.6×54+3.6×17
=3.6×(29+54+17)
=3.6×100
=360
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这道题要用简便计算,可以首先把3.6×54化成36x0.1x54=36x(0.1x54)=36x5.4,0.36x170=36÷100x170=36x(170÷100)=36x1.7,然后再把36提出来。这样就可以得到,2.9加上5.4再加上1.7,=8.3+1.7=10.然后再用36×10=360。所以这道题最后的结果是360。
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36×2.9+3.6×54+0.36×170
=36×2.9+36×5.4+36×1.7
=36×(2.9+5.4+1.7)
=36×10
=360
=36×2.9+36×5.4+36×1.7
=36×(2.9+5.4+1.7)
=36×10
=360
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36x2.9+3.6x54+0.36x170
=36x(2.9+5.4+1.7)
=36x(8.3+1.7)
=36x10
=360
=36x(2.9+5.4+1.7)
=36x(8.3+1.7)
=36x10
=360
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