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Work out. (a) \( \frac{1}{2} \) of 12 (b) \( 8 \times \frac{1}{5} \) Give your answer as a mixed number - OCR - GCSE Maths - Question 2 - 2018 - Paper 2

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Work-out.-(a)-\(-\frac{1}{2}-\)-of-12--(b)-\(-8-\times-\frac{1}{5}-\)-Give-your-answer-as-a-mixed-number-OCR-GCSE Maths-Question 2-2018-Paper 2.png

Work out. (a) \( \frac{1}{2} \) of 12 (b) \( 8 \times \frac{1}{5} \) Give your answer as a mixed number. (c) Isaac and Maya eat part of a pizza. Isaac eats \( \fr... show full transcript

Worked Solution & Example Answer:Work out. (a) \( \frac{1}{2} \) of 12 (b) \( 8 \times \frac{1}{5} \) Give your answer as a mixed number - OCR - GCSE Maths - Question 2 - 2018 - Paper 2

Step 1

(a) \( \frac{1}{2} \) of 12

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Answer

To calculate ( \frac{1}{2} ) of 12, use the formula:

12×12=6\frac{1}{2} \times 12 = 6

Thus, the answer is 6.

Step 2

(b) \( 8 \times \frac{1}{5} \) Give your answer as a mixed number.

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Answer

First, calculate the product:

8×15=858 \times \frac{1}{5} = \frac{8}{5}

To convert ( \frac{8}{5} ) to a mixed number, divide 8 by 5. This gives us 1 with a remainder of 3:

1351 \frac{3}{5}

So, the answer is ( 1 \frac{3}{5} ).

Step 3

(c) Isaac eats \( \frac{1}{6} \) of the pizza. Maya then eats \( \frac{3}{5} \) of the remaining pizza. What fraction of the original pizza is left?

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Answer

First, find out how much pizza Isaac eats:

Portion eaten by Isaac=16\text{Portion eaten by Isaac} = \frac{1}{6}

This leaves:

Remaining pizza=116=56\text{Remaining pizza} = 1 - \frac{1}{6} = \frac{5}{6}

Next, calculate how much pizza Maya eats of the remaining portion:

Maya’s portion=35×56=36=12\text{Maya's portion} = \frac{3}{5} \times \frac{5}{6} = \frac{3}{6} = \frac{1}{2}

Now, the total amount eaten by both:

Total eaten=16+12=16+36=46=23\text{Total eaten} = \frac{1}{6} + \frac{1}{2} = \frac{1}{6} + \frac{3}{6} = \frac{4}{6} = \frac{2}{3}

Finally, the fraction of the original pizza left is:

Fraction left=123=13\text{Fraction left} = 1 - \frac{2}{3} = \frac{1}{3}

Thus, the answer is ( \frac{1}{3} ).

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