Calculator Basics
What buttons reset the calculator?
2nd → 0 → 2 OR Clear + ON
Which is greater: 3/5 or 2/3?
2/3
0.25 = ?
1/4
Double 3/4 cup = ?
1 1/2 cups
3/4 was typed as 34. What went wrong?
Missing the fraction button (n/d)
What button clears the screen?
Clear
How do you enter a mixed number like 1 1/2?
2nd → n/d
5/8 = ?
0.625
Area of a square patio with side 9 m?
81 m²
Mixed number typed as 21/2. What happened?
Didn’t use mixed number format (2nd → n/d)
Why might your calculator give a “weird” answer?
Wrong mode (degree/radian/fraction settings) Extra operational sign (Syntax Error)
Show which is greater using reasoning: 3/5 or 2/3
2/3 (convert or cross multiply)
1.2 = ? (as a fraction)
6/5 or 1 1/5
Turn 1.75 into a fraction
7/4
Student gets a long decimal instead of a fraction. Why?
Didn’t toggle to fraction form
What should you check FIRST if your answer looks wrong?
Mode/settings
Explain how to compare fractions WITHOUT a calculator
Common denominators or cross multiplication
When is a decimal more useful in real life?
Money, measurements, real-world estimates
Square 1.75 (as a fraction)
(7/4)² = 49/16 or 3 1/16
Student types fraction but gets whole number. Why?
Entered incorrectly or simplified result misunderstood
Explain the FULL reset process and why it matters
2nd → 0 → 2; fixes incorrect modes/settings
Which is greater: 5/12 or 4/9? Show how you know.
4/9
(Reason: 5×9 = 45 and 4×12 = 48, so 4/9 is greater)
Explain how to convert ANY decimal to a fraction
Place over power of 10, simplify
Which is greater: √64 or 2³? Explain
Equal (both = 8)
Student keeps getting wrong answers with correct steps—what’s the likely issue?
Calculator mode or input error