Using algebra, prove that 0.136 × 0.2 is equal in value to \( \frac{1}{33} \).
- Edexcel - GCSE Maths - Question 16 - 2017 - Paper 2
Question 16
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=102=51
Now we can rewrite the original equation as:
0.136×0.2=0.136×51
Step 2
Calculate 0.136 × \( \frac{1}{5} \)
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Answer
Next, we calculate:
0.136×51=50.136
To divide 0.136 by 5, we can multiply 0.136 by 1 and simplify:
0.136=1000136
Thus,
1000136÷5=5000136
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:
5000136=62517
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=5611×625=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.