Maths Problem Solving

This is my maths problem solving and in this problem solving we are learning about time tables to find out the answer to the question. In the first question we are using time tables and adding to find out the answer for this question. In the next one we are using tables and adding again still to find out the answer to this question 1.
5 x 1 = 5
5 x .45 = 2.25  
5 + 2.25 = 7.25