How to multiply decimals

Question

ex: please

Answer 1

multiply like you regularily do. In the final answer put the decimal point where the decimal point is in your numbers (cummulatively)
1.5 < ---- decimal point one in
x 5
---
7.5 <------ decimal point one in

1.5 <----- decimal point one in
x 1.5 <------decimal point one in
------
2.25 <------ decimal point two in