68.5+31.5除以（0.29+0.41）如何简算?_数学解答

68.5+31.5除以（0.29+0.41）如何简算?

人气：281 ℃　时间：2020-09-25 19:47:25

解答

68.5+31.5÷（0.29+0.41）
=68.5+31.5÷0.7
=68.5+31.5×10/7
=（68.5+31.5）+31.5×3/7
=100+13.5
=113.5