Addition of 3-Digit Numbers with Regrouping

We will learn addition of 3-digit numbers with regrouping.

Addition of 3-Digit Numbers with Regrouping

1. Add 495 and 65.

Solution:

Step 1: Arrange the numbers vertically.

Step 2: Add the ones. 5 + 5 = 10 ones = 1 ten and 0 one. Write 0 in the ones column and carry over 1 to the tens column.

Step 3: Add the tens. 9 + 6 + 1 (carry over) = 16 tens = 1 hundred and 6 tens. Write 6 in the tens column and carry over 1 to the hundreds column.

Step 4: Add the hundreds. 4 +1 (carry over) = 5 hundreds. Write 5 in the hundreds column.

Addition of 3-Digit Numbers with Regrouping

Thus, 495 + 65 = 560



2. Add 379 and 558

Solution:

Step 1: Arrange the numbers vertically.

Step 2: Add the ones column. 9 + 8 = 17 ones = 1 ten and 7 ones. Write 7 in the ones column and carry over 1 to the tens column.

Step 3: Add the tens column. 7 + 5 + 1 (carry over) = 13 tens = 1 hundred and 3 tens. Write 3 in the tens column and carry over 1 to the hundreds column.

Step 4: Add the hundreds column. 3 + 5 + 1 (carry over) = 9 hundreds.

Addition of Two 3-Digit Numbers with Regrouping

Thus 379 + 558 = 937



Questions and Answers on Addition of 3-Digit Numbers with Regrouping:

I. Add the following numbers:

(i) 973 + 18

(ii) 536 + 69

(iii) 797 + 26

(iv) 479 + 32

(v) 284 + 33

(vi) 529 + 74

(vii) 664 + 9

(viii) 708 + 12

(ix) 675 + 38

(x) 468 + 68

(xi) 209 + 84

(xii) 900 + 92

(xiii) 421 + 79

(xiv) 579 + 78

(xv) 251 + 84

(xvi) 676 + 35


Answer:

I. (i) 981

(ii) 605

(iii) 826

(iv) 511

(v) 317

(vi) 603

(vii) 673

(viii) 740

(ix) 713

(x) 536

(xi) 393

(xii) 992

(xiii) 500

(xiv) 657

(xv) 335

(xvi) 711

 

II. Add the following numbers:

(i) 257 + 483

(ii) 559 + 207

(iii) 357 + 376

(iv) 436 + 354

(v) 618 + 162

(vi) 428 + 357

(vii) 364 + 546

(viii) 518 + 293

(ix) 329 + 600

(x) 533 + 428

(xi) 442 + 279

(xii) 269 + 542

(xiii) 364 + 263

(xiv) 490 + 240

(xv) 836 + 157

(xvi) 680 + 255


Answer:

II. (i) 740

(ii) 766

(iii) 733

(iv) 790

(v) 780

(vi) 785

(vii) 910

(viii) 811

(ix) 929

(x) 961

(xi) 721

(xii) 811

(xiii) 627

(xiv) 730

(xv) 993

(xvi) 935





3rd Grade Math Lessons

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