Question

4元3角，减1元9角怎么算？

Answer 1

4元3角=4.3元
1元9角=1.9元1.9
4.3-1.9
=4.3-(2-0.1)
=4.3-2+0.1
=2.3+0.1
=2.4(元)
4元3角减1元9角等于2元4角。