### [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 2.06666668877689 to the nearest ten (2 whole places)***Jul 23 10:45 UTC (GMT)***Round off 2.06666668877689 to the nearest ten (2 whole places)***Jul 23 10:45 UTC (GMT)***Round off 10.39 to the nearest one (1 whole place)***Jul 23 10:45 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:

**325 + 400 + 7,715 = ?***Jul 23 10:45 UTC (GMT)***1,006 + 941 = ?***Jul 23 10:44 UTC (GMT)***144 + 5,059 + 369 = ?***Jul 23 10:44 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:

**- 904 + 1,914 - 471 - 290 = ?***Jul 23 10:45 UTC (GMT)***879 + 1,899 - 451 + 246 = ?***Jul 23 10:45 UTC (GMT)***- 949 - 1,954 + 517 - 320 = ?***Jul 23 10:45 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