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
koimnoel, let's knock this out. a) To calculate 9 + 8 mentally: Step 1: Decompose one of the numbers to make 10 with the other. We can decompose 8 into 1 and 7. 9 + 8 = 9 + (1 + 7) Step 2: Add 9 and 1 to make 10. (9 + 1) + 7 = 10 + 7 Step 3: Add 10 and 7. 10 + 7 = 17 b) To use composition and decomposition of 10 for addition when the sum is more than 10: The strategy is to decompose one of the addends to compose a 10 with the other addend. Then, add the remaining part. • For 8 + 3: Decompose 3 into 2 and 1. Add 2 to 8 to make 10. Then add the remaining 1. 8 + 3 = 8 + (2 + 1) = (8 + 2) + 1 = 10 + 1 = 11 • For 4 + 8: Decompose 8 into 6 and 2. Add 6 to 4 to make 10. Then add the remaining 2. 4 + 8 = 4 + (6 + 2) = (4 + 6) + 2 = 10 + 2 = 12 • For 6 + 7: Decompose 7 into 4 and 3. Add 4 to 6 to make 10. Then add the remaining 3. 6 + 7 = 6 + (4 + 3) = (6 + 4) + 3 = 10 + 3 = 13 Send me the next one 📸