Calculation Tape
標準電卓 オンライン — メモリ機能付き基本計算機 | Cruse
四則演算、パーセント計算、メモリ保存（MC, MR, M+, M-）および計算履歴機能を備えた高速オンライン電卓。
ツールの使い方
Enter Numbers & Operators
Type directly on your physical keyboard (numbers, +, -, *, /, Enter) or click the responsive buttons on the digital keypad.
Use Memory Storage
Store values in temporary memory with MS, add to memory with M+, recall stored numbers with MR, and clear memory with MC.
Inspect History & Copy
View past calculation history in the side tape, click any past record to recall its result, or click Copy Result to transfer it to your clipboard.
技術仕様・標準規格
| Parameter / Standard | Specification |
|---|---|
| Calculation Engine | Double-precision floating-point arithmetic with floating-point rounding fix |
| Memory Registers | MC (Clear), MR (Recall), M+ (Add), M- (Subtract), MS (Store) |
| Input Modalities | Physical Keyboard (NumPad + standard keys) & Touch/Mouse Keypad |
| History Memory | Unlimited session calculation tape with one-click result recall |
| Privacy & Storage | 100% Client-Side in browser memory. Zero server telemetry or data logging. |
よくある質問
Can I use my physical computer keyboard to operate this calculator?
Yes! The calculator supports standard keyboard shortcuts. You can type numbers 0-9, decimal point (.), operators (+, -, *, /), Enter or = for equals, Backspace to delete the last digit, and Escape or "C" to clear.
How do the memory buttons (MC, MR, M+, M-, MS) work?
MS (Memory Store) saves the current display number into memory. MR (Memory Recall) fetches the stored number. M+ adds the current number to the memory value, M- subtracts it, and MC (Memory Clear) resets memory to 0. A visual [M] indicator appears whenever a value is saved in memory.
Does this calculator solve decimal rounding precision issues (like 0.1 + 0.2)?
Yes. Standard binary floating-point math often produces 0.30000000000000004. Our calculator engine normalizes floating precision results up to 12 significant figures to ensure clean, exact human decimal output.
Can I copy the calculated number to my clipboard?
Yes. Simply click the "Copy" button in the top toolbar or press Ctrl+C / Cmd+C when the calculator is active to copy the exact value to your clipboard instantly.