Can you explain the different results?

My answer will be here tomorrow

phone calculated 50+(50*2) while Casio calculated (50+50)*2 solving the one in the bracket first ... hope that helps!

The phone followed order of operations while the calculator made its calculations one at a time.

The old calculator is clearly the one used by the Inland Revenue to calculate people’s income tax demand, the IPhone appears to be the one for calculating an individual’s tax return! 😬.

Please = parentheses Excuse = exponents My = multiplication Dear = division Aunt = addition Sally = subtraction

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Yes IOS work in BODMAS Principle Sequence of working: 1. B bracket 2. O of 3. D divide 4. M multiple 5. A addition 6. S subtraction

My best guess is: there must have been a number stored already that was part of the second calculation in the second calculator. When it shows the GT (grand total) next to it there is an M as well. I could be wrong.