0,3р+0,15р

To solve this expression, we need to add the two terms together. However, we need to convert the decimals to fractions first:

0.3 = 3/10
0.15 = 15/100 = 3/20

Now we can add the fractions:

3/10 + 3/20

To add fractions, we need to find a common denominator. The smallest number that both 10 and 20 divide into is 20. So we need to convert the fractions to have a denominator of 20:

3/10 * 2/2 = 6/20
3/20 * 1/1 = 3/20

Now we can add the fractions:

6/20 + 3/20 = 9/20

Therefore, the expression simplifies to:

0.3р + 0.15р = 0.45р = 9/20р