五年级数学下册小数简便计算题

五年级数学下册小数简便计算题


简介:
1.0.25×4.78×4 =0.25×4×4.78 =1×4.78 =4.78 2.1.4×99+1.4 =1.4×(99+1) =1.4×100 =140 3.310÷2.5÷4 =310÷(2.5×4) =310÷10 =31 4.0.98×2.5 =(1-0.02)×2.5 =1×2.5-0.02×2.5 =2.5-0.05 =2.45