Translate the notation before entering it
Textbooks often use stacked fractions, superscripts and implied multiplication. A one-line calculator needs explicit grouping. Enter (a+b)/(c+d) when an entire sum is above another sum.
Use * for multiplication, / for division and ^ for powers. Parentheses specify which operations belong together. The homepage scientific mode also provides function keys.
Set the angle unit deliberately
Degrees and radians are different units for the same geometric angle. A full turn is 360 degrees or 2π radians. Set DEG for a degree-based problem and RAD when the input is in radians.
A plausible decimal can still be the answer to the wrong angle unit. Check the unit before calculating, especially after restoring an earlier expression from history.
Estimate, calculate, then interpret
Estimate the sign and order of magnitude first. After calculating, attach the appropriate units and consider whether the precision matches the original measurements.
Results use floating-point arithmetic and are rounded for display. History stores recent homepage calculations on this browser; independent tool pages show the current result without building a separate persistent history.
LET’S WORK IT THROUGH
Compare 6 + 2 × 5 with (6 + 2) × 5.
- Multiplication first gives 6 + 10 = 16.
- Parentheses first give 8 × 5 = 40.
- The same numbers yield different results because the grouping changed.
THE ANSWERThe first expression is 16; the second is 40.
YOUR TURN
A small check for understanding.
Evaluate (18 − 6)/3 + 2².
Reveal the answer
8. The grouped quotient is 4 and the square is 4.
Now try your own numbers.
The basic calculator includes input guidance and the limits of its supported calculations. Use it alongside the method above.
Open Basic calculator ↗A note on precision: preserve exact fractions where possible and round numerical results at the end. Found an unclear step? Prepare a correction report.