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JSS3: MATHEMATICS - 3RD TERM

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Lesson 6, Topic 1
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Fractions, Decimals, Percentages, Approximation (Revision)

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Topic Content:

• Fractions, Decimals, Percentages, Approximation (Revision)

Example 6.1.1:

Find the value contained in the box

$$\frac{3}{14} = \frac{\boxed{?} }{x}$$

Solution

First cross multiply

⇒ $$\scriptsize 3 \: \times \: 28 = 14 \: \times \: \boxed{?}$$

⇒ $$\scriptsize \boxed{?}= \normalsize \frac{ 3 \: \times \: 28}{14} \\ \scriptsize = 6$$

Example 6.1.2:

Simplify $$\frac{7}{9} \: + \: \frac{63}{x}$$

Solution

Cross multiply

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