This mathematics problem involves applying core mathematical principles and formulas. Below you will find a complete step-by-step solution with detailed explanations for each step, helping you understand not just the answer but the method behind it.
ScanSolve AI Answer
Here are the solutions to the mental maths problems. a) Step 1: Add the numbers. 12 + 12 + 12 = 36 The answer is 36. b) Step 1: Add the numbers. 40 + 40 + 40 = 120 The answer is 120. c) Step 1: Add the numbers. 60 + 60 + 60 + 60 = 240 The answer is 240. d) Step 1: Add the numbers sequentially. 10 + 20 = 30 Step 2: Continue adding. 30 + 40 = 70 Step 3: Complete the addition. 70 + 80 = 150 The answer is 150. e) Step 1: Perform the subtractions from left to right. 100 - 50 = 50 Step 2: Complete the subtraction. 50 - 30 = 20 The answer is 20. f) Step 1: Solve the expression inside the parentheses first. 50 - 30 = 20 Step 2: Perform the subtraction. 100 - 20 = 80 The answer is 80. g) Step 1: Solve the expression inside the parentheses first. 130 - 80 = 50 Step 2: Perform the subtraction. 500 - 50 = 450 The answer is 450. That's 2 down. 3 left today — send the next one.