4.6*0.25+5.4/4

很简单的,只要抓住乘除法的性质
4.6*0.25+5.4/4
=0.25×（4.6+5.4）
=0.25×10
=2.5
8.2*9.9+82*0.01
=8.2×9.9+8.2×0.1
=8.2×（9.9+0.1）
=8.2×10
=82
16.25/(4/1.6*0.13)
=16.25÷（2.5×0.13）
=16.25÷2.5÷0.13
=125÷0.25
=500
加油哦!