4.7×6.7×43－4.7递等式计算能简便要简便
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4.7×6.7×43－4.7
=4.7×6.7×(40+3)－4.7
=4.7×(6.7×40+6.7×3)-4.7
=4.7×(268+20.1)-4.7
=4.7×288.1-4.7
=4.7×287.1
=(5-0.3)×287.1
=1435.5-0.3×287.1
=1435.5-86.13
=1349.37
=4.7×6.7×(40+3)－4.7
=4.7×(6.7×40+6.7×3)-4.7
=4.7×(268+20.1)-4.7
=4.7×288.1-4.7
=4.7×287.1
=(5-0.3)×287.1
=1435.5-0.3×287.1
=1435.5-86.13
=1349.37
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