1. 5.84 +1.45 = $ 7.29
My strategy to do this kind of operations is always leaving the point in the same place
5.84
+ 1.45
______
the points always need to be in the same column then you sum starting in the right side so first 4+5=9 then 8+4=12 you only put the value of 2 and the one we left we sum with
5+1+1= 7
so the result of the sum os 7.29
2. In this example we do as we normally do the products but always to need in count how many numbers are after the point
5.89*4 =23.36
I did the product and the result, if the number were integers, will be 2336 how many numbers are after the point, there are 2 so the result with a point will be 23.36