Mixed Problems — Important Questions

281

Step 1: First add 149 and 456, then subtract 324. Step 2: 149 + 456: 9+6=15, write 5 carry 1. 4+5+1=10, write 0 carry 1. 1+4+1=6. So 149+456=605. Step 3: 605 - 324: 5-4=1. 0-2, borrow, 10-2=8, hundreds become 5. 5-3=2. So 605-324=281. Step 4: The answer is 281.

333

Step 1: First add 198 and 456, then subtract 321. Step 2: 198 + 456: 8+6=14, write 4 carry 1. 9+5+1=15, write 5 carry 1. 1+4+1=6. So 198+456=654. Step 3: 654 - 321: 4-1=3. 5-2=3. 6-3=3. So 654-321=333. Step 4: The answer is 333.

607

Step 1: First add 234 and 562, then subtract 189. Step 2: 234 + 562: 4+2=6. 3+6=9. 2+5=7. So 234+562=796. Step 3: 796 - 189: 6-9, borrow, 16-9=7. 8-8=0 (after borrowing, 9 became 8). Wait, let us redo: 796-189. 6-9 borrow: 16-9=7, tens become 8. 8-8=0, hundreds become 6. 6-1=5. Hmm, that gives 507. Let me recheck: 796-189. Ones: 6-9, borrow, 16-9=7, tens: 9-1(borrow)=8, 8-8=0, hundreds: 7-1=6. So 796-189=607. Step 4: The answer is 607.

188

Step 1: First add 459 and 232, then subtract 503. Step 2: 459 + 232: 9+2=11, write 1 carry 1. 5+3+1=9. 4+2=6. So 459+232=691. Step 3: 691 - 503: 1-3, borrow, 11-3=8, tens become 8. 8-0=8. 6-5=1. So 691-503=188. Step 4: The answer is 188.