Question

Which would be the most appropriate way to estimate -6.1(0.22)? Check all that apply.



1. Use rounding to get -6(0.2), and then multiply.

2. Use compatible numbers, such as -6(0.5), and then multiply.

3. Use the benchmark numbers -6 and 1 and then multiply.

4. Use front-end estimation to get -6(0.2), and then multiply.

5. Round the factors to the nearest whole number, and then multiply.



I think 5, 4, and 1