Which statements about solving the problem (0.1 × 5) + 0.4 are true? Check all that apply.
using a calculator will be much more efficient to solve the problem because there are multiple decimal operations to perform.
All of the calculations can be done quickly by hand, so using a calculator will be less efficient.
The first calculation cannot be done quickly by hand, so using a calculator will be more efficient.
If a calculator is going to be used, it is a good idea to compare it to an estimate of the actual calculation done by hand.
Using a calculator or solving the problem by hand can both result in the correct answer.