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 Exercise 15c: Step 1: Calculate 18 - 6 × 2 First, perform the multiplication: 18 - (6 × 2) = 18 - 12 Then, perform the subtraction: 18 - 12 = 6 The value is 6. Step 2: Calculate 12 ÷ 4 + 2 First, perform the division: (12 ÷ 4) + 2 = 3 + 2 Then, perform the addition: 3 + 2 = 5 The value is 5. Step 3: Calculate 6 - 18 ÷ 3 First, perform the division: 6 - (18 ÷ 3) = 6 - 6 Then, perform the subtraction: 6 - 6 = 0 The value is 0. Step 4: Calculate 4 × 5 + 8 ÷ 4 First, perform multiplication and division from left to right: (4 × 5) + (8 ÷ 4) = 20 + 2 Then, perform the addition: 20 + 2 = 22 The value is 22. Step 5: Calculate 16 ÷ 2 - 3 × 2 First, perform division and multiplication from left to right: (16 ÷ 2) - (3 × 2) = 8 - 6 Then, perform the subtraction: 8 - 6 = 2 The value is 2. Step 6: Calculate 7 × 3 + 27 ÷ 9 First, perform multiplication and division from left to right: (7 × 3) + (27 ÷ 9) = 21 + 3 Then, perform the addition: 21 + 3 = 24 The value is 24. Step 7: Calculate (5 + 3) + 3 × 5 First, perform the operation inside the parentheses: (8) + 3 × 5 Next, perform the multiplication: 8 + (3 × 5) = 8 + 15 Then, perform the addition: 8 + 15 = 23 The value is 23. Step 8: Calculate 5 + (3 + 3) × 5 First, perform the operation inside the parentheses: 5 + (6) × 5 Next, perform the multiplication: 5 + (6 × 5) = 5 + 30 Then, perform the addition: 5 + 30 = 35 The value is 35. Step 9: Calculate 4 × 6 - (7 - 3) First, perform the operation inside the parentheses: 4 × 6 - (4) Next, perform the multiplication: (4 × 6) - 4 = 24 - 4 Then, perform the subtraction: 24 - 4 = 20 The value is 20. Step 10: Calculate 8 × 3 - 17 + 15 ÷ 5 First, perform multiplication and division from left to right: (8 × 3) - 17 + (15 ÷ 5) = 24 - 17 + 3 Next, perform addition and subtraction from left to right: (24 - 17) + 3 = 7 + 3 Then, perform the addition: 7 + 3 = 10 The value is 10. Step 11: Calculate 28 ÷ 4 + 2 - 2 × 4 First, perform division and multiplication from left to right: (28 ÷ 4) + 2 - (2 × 4) = 7 + 2 - 8 Next, perform addition and subtraction from left to right: (7 + 2) - 8 = 9 - 8 Then, perform the subtraction: 9 - 8 = 1 The value is 1. Step 12: Calculate 6 × 2 - 2 - 40 ÷ 4 First, perform multiplication and division from left to right: (6 × 2) - 2 - (40 ÷ 4) = 12 - 2 - 10 Next, perform addition and subtraction from left to right: (12 - 2) - 10 = 10 - 10 Then, perform the subtraction: 10 - 10 = 0 The value is 0. Last free one today — make it count tomorrow, or type /upgrade for unlimited.