数学题一道（简算）请大家帮我简算一道数学题：80%-5×20%÷250%
问题描述：
数学题一道（简算）
请大家帮我简算一道数学题：80%-5×20%÷250%
答
0.8-5脳0.2/2.5=0.8-1/2.5=0.8-0.4=0.4
答
=0.8-5×0.2×0.4
=0.8-0.4
=0.4
答
80%-6×20%÷250%
=80%-100%÷250%
=80%-40%
=40%
=0.4
答
80%-5×20%÷250%
=0.8-5×0.2÷(5/2)
=0.8-5×0.2×(2/5)
=0.8-5×0.2×0.4
=10×0.08-5×0.08
=0.08×(10-5)
=0.08×5
=0.4