V0,04 • V81 - 7 V1/ 49

To simplify the given expression, we first need to calculate the values within the square roots.

1. √0,04 = √(4/100) = 2/10 = 1/5
2. √81 = 9
3. √(1/49) = 1/√49 = 1/7

Now, we can substitute these values back into the expression:

V0,04 • V81 - 7 V1/ 49 = (1/5) • 9 - 7 • (1/7) = 9/5 - 1 = (9-5)/5 = 4/5

Therefore, the simplified expression is 4/5.