1.3×4.7+1.3×4.3×1.3怎么简便运算
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1.3×4.7+1.3×4.3×1.3
=1.3x(4.7+4.3x1.3)
=1.3x(4.7+4.3 + 4.3x0.3)
=1.3x(9+ 1.29)
=1.3x(10+ 0.3 -0.01)
=13+0.39-0.013
=13+0.377
=13.377
=1.3x(4.7+4.3x1.3)
=1.3x(4.7+4.3 + 4.3x0.3)
=1.3x(9+ 1.29)
=1.3x(10+ 0.3 -0.01)
=13+0.39-0.013
=13+0.377
=13.377
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