| 应用广角 一、准确计算 1.直接写出得数 5 0.84 0.12 440 4.9 3 0.2 400 2.用竖式计算，除不尽的保留两位小数       3.计算下面各题，能简算的要简算 0.48+4.8÷0.16 =0.48+30 =30.48 19.2÷12.5÷8 =19.2÷(12.5×8) =19.2÷100 =0.192 7.8×9.9 =7.8×10-0.1×7.8 =78-0.78 =77.22 63-6.3-3.7 =63-(6.3+3.7) =63-10 =53 3.6×3.4+6.6×3.6 =3.6×(3.4+6.6) =3.6×10 =36 36×[(5-0.68)÷12] =36×(4.32÷12) =36×0.36 =12.96 |
