(14)计算:2.005×390+20.05×41+200.5×2

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(14)计算:2.005×390+20.05×41+200.5×2

(14)计算:2.005×390+20.05×41+200.5×2
(14)计算:2.005×390+20.05×41+200.5×2

(14)计算:2.005×390+20.05×41+200.5×2
2.005×390+20.05×41+200.5×2
=20.05×39+20.05×41+20.05×20
=20.05×(39+41+20)
=20.05×100
=2005

2.005×390+20.05×41+200.5×2
=20.05*39+20.05*41+20.05*20
=20.05*80+20.05*20
=20.05*100
=2005

2.005×390+20.05×41+200.5×2
=20.05×39+20.05×41+20.05×20
=20.25×(39+41+20)
=20.25×100
=2025