itomath.com

Calculator

Basic Calculations
Open a calculator page.
Type each of the following and press enter.
  • $2+7$
  • $2-7$
  • $2\cdot7$
  • $2÷7$
  • $\displaystyle \frac{2}{7}$ (press ctrl then ÷ to enter fractions)
Fractions and Decimals
If the calculator returns a fraction, you can return a decimal approximation by:
  • pressing ctrl then enter
Write $\displaystyle \frac{2}{7}$ correct to 6 decimal places:
To approximate a decimal to a fraction,
  • press menu > "2 Number" > "2 Approximate to Fraction"
Calculate $0.35\times0.1875$ and write the answer as a fraction:
Display Digits
To change the number of digits displayed for answers,
  • Press doc ▾ > "7 Settings & Status" > "2 Document Settings..."
    • Change "Display Digits" to "Float 6"
This will give answers to 6 significant figures. Use "Float 6" for the rest of this page.
Brackets, Negatives, Exponents and Roots
Calculate the following:
  • $-3-3$ (The first $-$ is negative (-). The second $-$ is subtract -)
  • $-3-(-3)$
  • $-3(-3)$
  • $-3^2$
  • $(-3)^2$
  • $(-3)^3$ (^ for exponents)
  • $\sqrt{3}$
  • $\sqrt{-3} =$ Error: Non-real calculation
  • $\sqrt[3]{3}$
Calculate to 6 significant figures: $\displaystyle\frac{3-3^\frac{-3}{\sqrt{3}}}{\left(\sqrt[3]{3}\right)^{-3(-3)}}=$
Using the previous answer
  1. Enter $1+2$ then press enter
  2. Type + $3$ then press enter
  3. Type + $4$ then press enter
  4. Type $1$ ÷ ctrl (-) then press enter
    5. What was the result?
Copying and modifying previous calculations
Calculate $\displaystyle\frac{6+\sqrt{(-6)^2-4(3)(2)}}{2(3)}=$
To modify this calculation,
  • Press ▴ until you highlight $\displaystyle\frac{6+\sqrt{(-6)^2-4(3)(2)}}{2(3)}$, then press enter
  • Change the $+$ into a $-$ by pressing ◂, deleting $+$ and replacing it with $-$
Follow these steps to calculate $\displaystyle\frac{6-\sqrt{(-6)^2-4(3)(2)}}{2(3)}=$
Clearing the page
To clear the history,
  • press menu > "1 Actions" > "5 Clear History"