Mary buys three skirts at $25 each, and four blouses at $20 each. How much did she spend? Enter in the following expression, in both calculators, just as it is written. Which one is correct?

3 x 25 + 4 x 20

Try some other expressions.

12 ÷ 3 + 8 ÷ 4

6 x 9 - 24 ÷ 8

Which type of calculator is more consistently accurate?