4.6×15.5-0.46×55=4.6×15.5-4.6×0.1×55=4.6×15.5-4.6×5.5=4.6×（15.5-5.5）=4.6×10=46简便计算方法就是把0.46变成4.6，然后提取公因数4.6，这样就简便了。
4.6×15.5-0.46×55=4.6×15.5-0.46×10÷10×55=4.6×15.5-4.6×5.5=4.6×(15.5-5.5）=4.6×10=46
