3.14×0.68+31.4×0.032.

问题描述:

3.14×0.68+31.4×0.032.

3.14×0.68+31.4×0.032,
=3.14×0.68+3.14×0.32,
=3.14×(0.68+0.32),
=3.14×1,
=3.14.