20.07×39+200.7×4.1+40×10.035.
问题描述:
20.07×39+200.7×4.1+40×10.035.
答
20.07×39+200.7×4.1+40×10.035,
=20.07×39+20.07×41+20×20.07,
=20.07+(39+41+20),
=20.07×100,
=2007;