Question

Perform the indicated operation.

$\mathbf{2}\mathbf{.}\mathbf{8}\mathbf{-}\left(\mathbf{-}\mathbf{4}\mathbf{.}\mathbf{7}\right)$

Short answer

The result of the operation is $7.5$.

Step-by-step solution

Step-1- Addition/subtraction of two decimals

To add two numbers with same sign, add the numbers and place sign before the number.

To add two numbers of opposite sign, subtract the smaller number from the bigger one and place the sign of the larger number before the result.

Step-2-Perform the operation

The given expression is $2.8-\left(-4.7\right)$.

So,

$\begin{array}{l}2.8-(-4.7)=2.8+4.7\\ 2.8-(-4.7)=7.5\end{array}$

Step-3-Conclusion

The result of the operation is $7.5$.