Question

0.389×468+389×0.658-38.9×1.26．

Answer 1

解：0.389×468+389×0.658-38.9×1.26，
=38.9×4.68+38.9×6.58-38.9×1.26，
=38.9×（4.68+6.58-1.26），
=38.9×10，
=389．
分析：根據(jù)數(shù)字特點(diǎn)，原式變?yōu)?8.9×4.68+38.9×6.58-38.9×1.26，運(yùn)用乘法分配律簡算．
點(diǎn)評：完成本題，要注意分析式中數(shù)據(jù)，通過數(shù)字變形，運(yùn)用合適的簡便方法計(jì)算．