ORC GCSE MATHS BASIC CALCULATION SKILLS:1.2 ORDER OF OPERATIONS (LATEST) A+GRADED GUARANTEED SUCCESS

1.2 Order of operations ©Cambridge University Press and OCR 2021 2 TIP Remember that a fraction such as becomes and a root such as becomes . 2 Which of the solutions is correct in each case? Find the mistakes in the incorrect option. Option A Option B a 8 × 3 + 4 8 × 3 + 4 = 24 + 4 = 28 8 × 3 + 4 = 8 × 7 = 56 b = 5 × 4 + 81 = 20 + 81 = 101 = 5 × 121 = 605 c 35 − [−20 × (5 − 4)] 35 − [−20 × (5 − 4)] = 35 − [−20 × 1] = 35 + 20 = 55 35 − [−20 × (5 − 4)] = 35 + 20 × (−1) = 35 − 20 = 15 d 30 − 8 ÷ 2 + 2 30 − 8 ÷ 2 + 2 = 22 ÷ 2 + 2 = 11 + 2 = 13 30 − 8 ÷ 2 + 2 = 30 − 4 + 2 = 28 e = 5 − 4 + 28 ÷ 4 + 1 = 1 + 7 + 1 = 9 = 3 + 7 + 1 = 11 3 Add brackets ( ) to make each statement correct. a 4 + 5 × 2 + 3 = 29 b 3 + 6 ÷ 2 × 4 = 18 c 12 ÷ 4 − 3 × 2 = 24 4 Calculate. a 5 × 11 + 4 − 1 b −3 × (11 − 2) c d 25 + 6 × 3 +