 A course onaddition and subtraction in the sixth grade. This lesson focuses on the operating techniques and vocabulary of addition and subtraction.
Add and subtract in columns and rows. Operative techniques with a carry and calculate the sum or difference of two decimal numbers or two integers. This lesson is a PDF download so that students and teachers have resources on adding and subtracting two numbers. These are the first two operations covered in primary school and the objective in the sixth grade is to remediate them so that the student masters the fundamentals of the basic operating techniques. The student must master the definitions and properties of these two operations as well as the vocabulary that will be recurrent throughout his schooling.

## I. Addition of two decimal numbers :

Definition:
• The numbers that are added together are called terms;
• The result of an addition is called the sum.

Example:

Put and calculate 1 856 + 525.

The numbers are placed one under the other, starting with the unit numbers.

The numbers 1,856 and 525 are the terms.

The result 2,381 is the sum. Ownership:

In an addition, we have the right:

• to group the terms;
• to change the terms of the places.

We say that the addition is commutative.

Example:

Clever calculation: .

## II. Subtraction of two decimal numbers

Definition:
• The numbers that are subtracted are called terms;
• the result of a subtraction is called the difference.

Example:

Put and calculate 233 – 67.

• The numbers 233 and 67 are the terms of the subtraction.
• The result 166 is the difference.

Remark:

You can’t change the place of terms in a subtraction. L'addition, la soustraction et les durées

QCM de maths sur l’addition et la soustraction  et les durées en 6ème.

Things to remember: • Know the definition of a term, a sum and a difference;
• Know how to add in rows and columns
• Know how to subtract in rows and columns;
• Give an order of magnitude of a sum or a difference

This course is in accordance with the official programs of thenational education.

In addition, you can continue with the exercises on the 4 operations in the sixth grade.

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