4.2×2.6-2.2×4.6的简便运算
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2016-09-27
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4.2×2.6-2.2×4.6的简便运算
=4.2x2.6-2.2x2.6-2.2x2
=(4.2-2.2)x2.6-2.2x2
=2x2.6-2.2x2
=2x(2.6-2.2)
=2x0.4
=0.8
=4.2x2.6-2.2x2.6-2.2x2
=(4.2-2.2)x2.6-2.2x2
=2x2.6-2.2x2
=2x(2.6-2.2)
=2x0.4
=0.8
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