解:18.6×2.4+28.6×7.6=18.6×2.4+(18.6+10)×7.6=18.6×2.4+18.6×7.6+10×7.6=18.6×(2.4+7.6)+76=18.6×10+76=186+76=262这道题的关键在于怎么拆分,然后用乘法分配率简便运算。