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

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
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

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
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

4分之15÷9分之5+3.75×5分之3=9
3分之2×0.3÷3分之2×0.3=0.09

4分之15÷9分之5+3.75×5分之3
15/4÷5/9+3.75*3/5=15/4*9/5+15/4*3/5=15/4*（9/5+3/5）=9

15/4÷5/9+3.75×3/5
=15/4×9/5+15/4×3/5=15/4×（9/5+3/5）=15/4×12/5=9

2/3×0.3÷2/3×0.3=2/3÷2/3×0.3×0.3=0.09