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22+0.22*3300+330*4.4的简便方法
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22+0.22*3300+330*4.4的简便方法
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22+0.22×3300+330×4.4
=22+22×33+33×10×2×2.2
=22+22×33+(33×2)×(10×2.2)
=22+22×33+66×22
=(1+33+66)×22
=100×22
=2200
=22+22×33+33×10×2×2.2
=22+22×33+(33×2)×(10×2.2)
=22+22×33+66×22
=(1+33+66)×22
=100×22
=2200
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