问题
填空题
计算:7.81×49-78.1×3.8+0.781×90=______.
答案
7.81×49-78.1×3.8+0.781×90,
=78.1×4.9-78.1×3.8+78.1×0.9,
=78.1×(4.9-3.8+0.9),
=78.1×2,
=156.2
故答案为:156.2.
计算:7.81×49-78.1×3.8+0.781×90=______.
7.81×49-78.1×3.8+0.781×90,
=78.1×4.9-78.1×3.8+78.1×0.9,
=78.1×(4.9-3.8+0.9),
=78.1×2,
=156.2
故答案为:156.2.