# Add the numbers: 85 + 66 = ? Calculate the natural numbers sum and learn how to do the addition, column adding method, from right to left

## The numbers addition to perform:

85 + 66

### Method used below: column adding, from right to left (traditional).

### Stack the numbers on top of each other.

#### The ones digits line up in the first column from the right.

#### The tens digits line up in the next column to the left.

## Add column by column; start from the column on the right.

### Add the digits in the ones column:

#### 5 + 6 = 11

#### How did we add the digits? Explanation below.

#### Group the ones together in order to make tens:

#### 5 + 6 =

#### 5 + 6 =

#### 4 + 1 + 6 =

#### 4 + 1 + 6 =

#### (4 + 6) + 1 =

#### 10 + 1 =

#### 11

#### Change the order in which the numbers are added, the sum stays the same.

Break some number(s) into component parts, the sum stays the same.

#### The sum is a two-digit number: 11.

#### 1 is the ones digit.

Write it down at the base of the ones column.

#### 1 is the tens digit.

Carry it over to the tens column.

Write the digit above that column.

Add it with the rest of the digits in that column.

### Add the digits in the tens column:

#### 8 + 6 + 1 = 15

#### How did we add the digits? Explanation below.

#### Group the ones together in order to make tens:

#### 8 + 6 + 1 =

#### 8 + 6 + 1 =

#### 8 + 7 =

#### 8 + 7 =

#### 8 + 2 + 5 =

#### 8 + 2 + 5 =

#### 10 + 5 =

#### 15

#### The sum is a two-digit number: 15.

#### 5 is the tens digit.

Write it down at the base of the tens column.

#### 1 is the hundreds digit.

Write it down at the base, next to the tens digit.

## Answer:

## 85 + 66 = 151

## Addition Calculator: Add Numbers & Learn to Calculate the Sum

#### 1. Stack the numbers on top of each other. 2. Add column by column starting from the column on the right.

## The latest 13 operations with added numbers:

** 85 + 66 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 735 + 211 + 182 + 154 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 8,997 + 9,363 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 61 + 107 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 86 + 97 + 99 + 120 + 126 + 155 + 148 + 224 + 353 + 618 + 1,122 + 2,151 + 4,210 + 8,306 + 16,483 + 32,868 + 65,638 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 889 + 1,159 + 222 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 217 + 5,107 + 399 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 108 + 119 + 144 + 162 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 156 + 139 + 157 + 164 + 160 + 164 + 137 + 164 + 151 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 7,972 + 3,197 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 469 + 427 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 7,434 + 3,265 + 458 = ? ** | * Nov 02 08:04 UTC (GMT)* |

** 1,019 + 9,367 + 2,087 = ? ** | * Nov 02 08:03 UTC (GMT)* |

** All the operations with the numbers added by users... ** |

## How to add natural numbers? Let's learn with an example:

### The numbers addition to perform:

48 + 85

#### Method used below: column adding, from right to left (traditional)

### Stack the numbers on top of each other.

#### The ones digits line up in the first column from the right.

#### The tens digits line up in the next column to the left.

### Add column by column; start from the column on the right

### Add the digits in the ones column:

#### 8 + 5 = 13

#### How did we add the digits? Explanation below.

#### Group the ones together in order to make tens:

#### 8 + 5 =

#### break into component parts: 8 + 5 =

#### 8 + 2 + 3 =

#### group by 2: 8 + 2 + 3 =

#### 10 + 3 =

#### 13

#### Change the order in which the numbers are added, the sum stays the same.

Break some number(s) into component parts, the sum stays the same.

#### The sum is a two-digit number: 13.

#### 3 is the ones digit.

Write it down at the base of the ones column.

#### 1 is the tens digit.

Carry it over to the tens column.

Write the digit above that column.

Add it with the rest of the digits in that column.

### Add the digits in the tens column:

#### 4 + 8 + 1 = 13

#### How did we add the digits? Explanation below.

#### Group the ones together in order to make tens:

#### 4 + 8 + 1 =

#### add marked digits: 4 + 8 + 1 =

#### (4 + 1) + 8 =

#### 5 + 8 =

#### break into component parts: 5 + 8 =

#### 2 + 3 + 8 =

#### group by 2: 2 + 3 + 8 =

#### (2 + 8) + 3 =

#### 10 + 3 =

#### 13

#### Change the order in which the numbers are added, the sum stays the same.

Break some number(s) into component parts, the sum stays the same.

#### The sum is a two-digit number: 13.

#### 3 is the tens digit.

Write it down at the base of the tens column.

#### 1 is the hundreds digit.

Since there is no hundreds column...

Write it down at the base, next to the tens digit.

### Answer:

48 + 85 = 133