### [1] Calculator 1: Rounding off Positive and Negative Numbers to Whole or Decimal Places, Online Calculator, Mathematical Explanations

### The latest 3 operations with rounded off numbers:

**Round off 12,503,386 to the nearest ten million (8 whole places)***Oct 14 22:59 UTC (GMT)***Round off 230.444444449 to the nearest tenth (1 decimal place)***Oct 14 22:59 UTC (GMT)***Round off 32.1 to the nearest one (1 whole place)***Oct 14 22:59 UTC (GMT)***All the operations with the numbers rounded off by users...**### [2] Calculator 2: Adding natural numbers calculator: calculate the sum and learn how to add multiple digit numbers

### The latest 3 operations with added numbers:

**656 + 806 = ?***Oct 14 22:59 UTC (GMT)***367 + 5,240 + 562 = ?***Oct 14 22:59 UTC (GMT)***173 + 190 + 208 + 247 = ?***Oct 14 22:59 UTC (GMT)***All the operations with the numbers added by users...**### [3] Calculator 3: Subtracting integer numbers calculator: calculate the difference and learn how to subtract multiple digit numbers

### The latest 3 operations with subtracted numbers:

**- 464 - 386 + 510 + 373 + 964 = ?***Oct 14 22:59 UTC (GMT)***- 387 - 67 + 126 - 57 - 103 + 76 - 145 = ?***Oct 14 22:59 UTC (GMT)***- 892 + 1,901 - 464 + 256 = ?***Oct 14 22:59 UTC (GMT)***All the operations with the numbers subtracted by users...**

### [1] How to Round Off Numbers to Whole or Decimal Places, Theory, Explanations, Examples. Special Cases

### [2] How to add natural numbers: calculate the sum and learn to add multiple digit numbers by using the column addition method

### [3] How to subtract numbers: calculate the difference and learn to subtract multiple digits numbers by using the column subtracting method