用简便方法计算:314×0.043+3.14×7.2-31.4×0.15.
问题描述:
用简便方法计算:314×0.043+3.14×7.2-31.4×0.15.
答
314×0.043+3.14×7.2-31.4×0.15,
=31.4×0.43+31.4×0.72-31.4×0.15,
=31.4×(0.43+0.72-0.15),
=31.4×1,
=31.4.