We will learn ‘what unitary method is’ and how to solve problems using unitary method.

The method of finding first the value of one quantity from the value of given quantities and then the value of required quantities is called the **unitary method**.

While working out the problems using the unitary method, we come across certain variations where the two quantities depend on each other in such a way that changes in one results in the change in other; then the two quantities are said to be in variation.

Types of variation:

The two quantities may be linked in such a way that

● if one increases, other also increases. If one decreases, the other also decreases.

● or if one increases, other decreases. If one decreases, the other increases.

This change results in two variations.

1. Direct variation

2. Inverse variation

Now we will learn what ‘direct variation and inverse variation’ is and their different situations.

Situations of Direct Variation

Situations of Inverse Variation

Direct Variations Using Unitary Method

Direct Variations Using Method of Proportion

Inverse Variation Using Unitary Method

Inverse Variation Using Method of Proportion

Problems on Unitary Method using Direct Variation

Problems on Unitary Method Using Inverse Variation

Mixed Problems Using Unitary Method**7th Grade Math Problems**

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