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 your mathematics exercises. EXERCISE 3: Round off to the nearest 10. 1. To round 465 to the nearest 10, look at the ones digit. Since it is 5, round up the tens digit. 465 ≈ 470 2. To round 8235 to the nearest 10, look at the ones digit. Since it is 5, round up the tens digit. 8235 ≈ 8240 3. To round 1932 to the nearest 10, look at the ones digit. Since it is 2 (less than 5), keep the tens digit the same. 1932 ≈ 1930 4. To round 89 to the nearest 10, look at the ones digit. Since it is 9 (greater than 5), round up the tens digit. 89 ≈ 90 5. To round 4599 to the nearest 10, look at the ones digit. Since it is 9 (greater than 5), round up the tens digit. This means the 9 in the tens place becomes 10, so carry over to the hundreds place. 4599 ≈ 4600 EXERCISE 4: Use any method to calculate the following. 1. 3572 + 2981 = 6553 2. 4175 + 3834 = 8009 3. 6715 + 285 = 7000 4. 1853 + 7146 = 8999 5. 4562 + 3825 = 8387 6. 6258 + 649 = 6907 7. 947 + 384 = 1331 8. 4705 + 2327 = 7032 9. 8376 + 4753 = 13129 10. 6482 + 7586 = 14068 EXERCISE 5: Replace the letters with the correct numbers. In a number pyramid, each block is the sum of the two blocks directly below it. Step 1: Find the value of 'a'. The block 3231 is the sum of 1647 and a. 1647 + a = 3231 To find a, subtract 1647 from 3231: a = 3231 - 1647 a = 1584 Step 2: Find the value of 'b'. The block b is the sum of 2131 and 1252. b = 2131 + 1252 b = 3383 That's 2 down. 3 left today — send the next one.