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Using algebra, prove that 0.136 × 0.2 is equal in value to \( \frac{1}{33} \). - Edexcel - GCSE Maths - Question 16 - 2017 - Paper 2

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Using algebra, prove that 0.136 × 0.2 is equal in value to \( \frac{1}{33} \).

Worked Solution & Example Answer:Using algebra, prove that 0.136 × 0.2 is equal in value to \( \frac{1}{33} \). - Edexcel - GCSE Maths - Question 16 - 2017 - Paper 2

Step 1

Convert 0.2 to a Fraction

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Answer

First, we convert 0.2 into a fraction. We can express 0.2 as:

0.2=210=150.2 = \frac{2}{10} = \frac{1}{5}

Now we can rewrite the original equation as:

0.136×0.2=0.136×150.136 \times 0.2 = 0.136 \times \frac{1}{5}

Step 2

Calculate 0.136 × \( \frac{1}{5} \)

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Answer

Next, we calculate:

0.136×15=0.13650.136 \times \frac{1}{5} = \frac{0.136}{5}

To divide 0.136 by 5, we can multiply 0.136 by 1 and simplify:

0.136=13610000.136 = \frac{136}{1000}

Thus,

1361000÷5=1365000\frac{136}{1000} \div 5 = \frac{136}{5000}

Step 3

Convert \( \frac{136}{5000} \) into a Fraction

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Answer

Now, we simplify ( \frac{136}{5000} ) and express it in terms of a simpler fraction. Reducing it will help us see if it is equal to ( \frac{1}{33} ).

To do this, we perform long division or find a common factor. After simplifying:

1365000=17625\frac{136}{5000} = \frac{17}{625}

Now, we need to check if ( \frac{17}{625} ) is equal to ( \frac{1}{33} ).

Step 4

Cross-Multiply to Prove the Equality

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Answer

To prove that these two fractions are equal, we can cross-multiply:

17×33=56117 \times 33 = 561 1×625=6251 \times 625 = 625

Since 561 does not equal 625, it appears we need to refine our approach.

Performing further checks or revisiting earlier steps may help in verifying this equality properly.

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