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
Step 1: Solve problem 3. The problem is - (12 ÷ 3) = 6. Let the missing number be x. x - (12 ÷ 3) = 6 First, calculate the division in the parentheses: x - 4 = 6 Add 4 to both sides of the equation: x = 6 + 4 x = 10 The student's work incorrectly substituted 30 for the missing number, which led to 30 - 4 = 26, not 6. The subsequent step 18 ÷ 3 = 6 is a separate true statement but does not follow from the equation. The missing number is 10. Step 2: Solve the problem 18 + + 12 = 98. Let the missing number be y. 18 + y + 12 = 98 Combine the constant terms on the left side: 30 + y = 98 Subtract 30 from both sides of the equation: y = 98 - 30 y = 68 The missing number is 68. Step 3: Solve the problem 5 + + 12 = 95. Let the missing number be z. 5 + z + 12 = 95 Combine the constant terms on the left side: 17 + z = 95 Subtract 17 from both sides of the equation: z = 95 - 17 z = 78 The missing number is 78. 3 done, 2 left today. You're making progress.