以下のガイドはまだ日本語に翻訳されていないため、英語で表示しています。計算機自体はすべて日本語に対応しています。
この計算機の使い方
- Click the buttons or type with your keyboard.
- Press = or Enter to see the result. Esc clears and Backspace deletes the last character.
- Keep calculating from the result by pressing an operator, or click a previous calculation in the history to edit it.
計算式
The calculator follows the standard order of operations: parentheses, then multiplication and division from left to right, then addition and subtraction from left to right. Many cheap pocket calculators evaluate strictly left to right instead, which can give different answers.
2 + 3 × 4 = 14 (not 20)
(2 + 3) × 4 = 20
よくある質問
Why does 0.1 + 0.2 give exactly 0.3?
Many software calculators use binary floating point, which gives 0.30000000000000004. This calculator uses decimal arithmetic, so results match what you'd get by hand.
Do I need the scientific calculator?
Use the scientific calculator for powers, roots, trigonometry, logarithms, factorials and memory functions.
Can I use the keyboard?
Yes. Type numbers and + − * / ( ) directly, and press Enter to calculate.