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 for the mixed operations with parentheses: a) (31 + 68) × 7 Step 1: Perform the operation inside the parentheses. 31 + 68 = 99 Step 2: Multiply the result by 7. 99 × 7 = 693 The value is 693. b) (48 - 16) ÷ 4 Step 1: Perform the operation inside the parentheses. 48 - 16 = 32 Step 2: Divide the result by 4. 32 ÷ 4 = 8 The value is 8. c) 13 × 7 - (42 + 15) Step 1: Perform the operation inside the parentheses. 42 + 15 = 57 Step 2: Perform the multiplication. 13 × 7 = 91 Step 3: Perform the subtraction. 91 - 57 = 34 The value is 34. d) 76 ÷ 4 + (168 - 86) Step 1: Perform the operation inside the parentheses. 168 - 86 = 82 Step 2: Perform the division. 76 ÷ 4 = 19 Step 3: Perform the addition. 19 + 82 = 101 The value is 101. e) (7 × 7) + 16 ÷ 4 - 22 Step 1: Perform the operation inside the parentheses. 7 × 7 = 49 Step 2: Perform the division. 16 ÷ 4 = 4 Step 3: Perform addition and subtraction from left to right. 49 + 4 - 22 = 53 - 22 = 31 The value is 31. f) 316 - (18 × 5) + 3 + 217 Step 1: Perform the operation inside the parentheses. 18 × 5 = 90 Step 2: Perform addition and subtraction from left to right. 316 - 90 + 3 + 217 = 226 + 3 + 217 = 229 + 217 = 446 The value is 446. That's 2 down. 3 left today — send the next one.