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Insert brackets to make each of these calculations correct - OCR - GCSE Maths - Question 3 - 2019 - Paper 1

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Insert brackets to make each of these calculations correct. 5 × 3 − 1 = 10 3 + 6 − 2 ÷ 2 = 3.5

Worked Solution & Example Answer:Insert brackets to make each of these calculations correct - OCR - GCSE Maths - Question 3 - 2019 - Paper 1

Step 1

5 × 3 − 1 = 10

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Answer

To make this calculation correct, we can insert brackets as follows:

5×(3−1)=105 \times (3 - 1) = 10

Calculating this gives:

5×2=105 \times 2 = 10

Thus, the correct expression is: 5 × (3 − 1) = 10.

Step 2

3 + 6 − 2 ÷ 2 = 3.5

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Answer

For this calculation, we can correctly insert brackets as follows:

(3+6−2)÷2=3.5(3 + 6 - 2) ÷ 2 = 3.5

Calculating this step-by-step gives:

  1. First, calculate inside the brackets: 3+6−2=73 + 6 - 2 = 7
  2. Then, divide by 2: 7÷2=3.57 ÷ 2 = 3.5

So, the correct expression is: (3 + 6 − 2) ÷ 2 = 3.5.

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