帮我做几道数学题 4分之15÷9分之5+3.75×5分之3 3分之2×0.3÷3分之2×0.3_数学解答

帮我做几道数学题 4分之15÷9分之5+3.75×5分之3 3分之2×0.3÷3分之2×0.3

人气：473 ℃　时间：2020-01-28 13:05:31

解答

4分之15÷9分之5+3.75×5分之3
=15/4x9/5+15/4x3/5
=15/4x(9/5+3/5)
=15/4x12/5
=9
3分之2×0.3÷3分之2×0.3
=2/3÷2/3x(0.3x0.3)
=1x0.09
=0.09