Subtraction of 3-Digit Numbers without Regrouping

Subtraction of 3-digit numbers without regrouping  are explained here with examples.

1. Ron has a ream of paper having 140 sheets in it. He has used 40 sheets for his project report. How many sheets are left in the ream?

Solution:

To find out the number of sheets left, we will perform subtraction.

To subtract 3-digit numbers, the numbers are written one below the other.

While subtracting 3 digit number, we subtract ones digit first, then tens digit and finally the hundreds digit.

Subtraction of 3-Digit Numbers without Regrouping

So, 100 pages are left with Ron.


2. Subtract 354 from 699.

Solution:

Step I: Arrange the numbers vertically.

Step II: First subtract the ones column. 9 - 4 = 5

Step III: Now, subtract the tens column. 9 – 5 = 4

Lastly, subtract the hundreds column. 6 – 3 = 3

Subtracting 3-Digit Numbers without Regrouping

Thus, 699 – 354 = 345


3. Subtract 312 from 653.

3-Digit Subtraction

Step I: Arrange the number in coloumns of tens and ones.

Step II: Subtract ones.

Step III: Then, subtract tens.

Step IV: At last, subtract hundreds. 


4. Subtract 423 from 687.

Step I: Arrange the numbers in hundreds, tens and ones.

              H     T     O

              6     8     7

         -    4     2     3

         ____________

         

Step II: Subtract the ones.

              H     T     O

              6     8     7

         -    4     2     3

                            4


Step III: Subtract the tens.

              H     T     O

              6     8     7

         -    4     2     3

                     6     4


Step III: Subtract the hundreds.

              H     T     O

              6     8     7

         -    4     2     3

              2     6     4


Thus, 687 - 423 = 264


Questions and Answers on Subtraction of 3-Digit Numbers without Regrouping:

I. Subtract the following 3-Digit Numbers without Regrouping:

(i) 

               H     T     O

               3      4     4

           -          1      2

          ____________

(ii) 

               H     T     O

               4      6     8

           -          3      4

          ____________

(iii) 

               H     T     O

               8      8     8

           -          2      1

          ____________

(iv) 

               H     T     O

               2      8     6

           -          5      0

          ____________

(v) 

               H     T     O

               9      3     2

           -          2      0

          ____________

(vi) 

               H     T     O

               6      7     8

           -          1      6

          ____________

(v) 

               H     T     O

               7      6     8

           -          5      2

          ____________

(vi) 

               H     T     O

               8      4     5

           -          2      1

          ____________

(vii) 

               H     T     O

               9      3     9

           -          1      7

          ____________

(viii) 

               H     T     O

               5      2     6

           -          1      5

          ____________

(ix) 

               H     T     O

               3      6     5

           -          4      4

          ____________

(x) 

               H     T     O

               8      4     5

           -   4     3      2

          ____________

(xi) 

               H     T     O

               2      4     3

           -   1     2      2

          ____________

(xii) 

               H     T     O

               7      5     4

           -   2     1      2

          ____________

(xiii) 

               H     T     O

               8      3     5

           -   8     3      4

          ____________

(xiv) 

               H     T     O

               8      7     6

           -   2     2      1

          ____________

(xv) 

               H     T     O

               4      5     7

           -   2     3      5

          ____________

(xvi) 

               H     T     O

               9      9     9

           -   3      3     3

          ____________

(xvii) 

               H     T     O

               7      4     7

           -   3      2     4

          ____________

(xviii) 

               H     T     O

               8      7     8

           -   4      2     5

          ____________

(xix) 

               H     T     O

               9      7     5

           -   3      6     1

          ____________

(xx) 

               H     T     O

               8      6     7

           -   3      3     4

          ____________


II. Subtract the following without Regrouping:

(i) 587 - 63

(ii) 864 - 54

(iii) 734 - 22

(iv) 468 - 105

(v) 351 - 30

(vi) 536 - 105

(vii) 227 - 106

(viii) 679 - 253

(ix) 783 - 260

(x) 975 - 342

(xi) 666 - 510

(xii) 897 - 451

(xiii) 793 - 482

(xiv) 503 - 200

(xv) 742 - 630

(xvi) 438 - 104

(xvii) 679 - 234

(xviii) 868 - 536

(xix) 568 - 122

(xx) 389 – 324


Answer:

II. (i) 524

(ii) 810

(iii) 712

(iv) 363

(v) 321

(vi) 431

(vii) 121

(viii) 426

(ix) 523

(x) 633

(xi) 156

(xii) 446

(xiii) 311

(xiv) 303

(xv) 112

(xvi) 334

(xvii) 445

(xviii) 332

(xix) 446

(xx) 65


III. Subtract the numbers without Regrouping:

(i) 453 - 41

(ii) 536 - 12

(iii) 846 - 34

(iv) 973 - 642

(v) 128 - 128

(vi) 810 - 600

(vii) 685 - 430

(viii) 786 - 243

(ix) 498 - 303


Answer:

III. (i) 453 - 41

(ii) 536 - 12

(iii) 846 - 34

(iv) 973 - 642

(v) 128 - 128

(vi) 810 - 600

(vii) 685 - 430

(viii) 786 - 243

(ix) 498 - 303


IV. Do these sum in your notebook:

(i) 555 - 34

(ii) 286 - 50

(iii) 957 - 25

(iv) 634 - 23

(v) 473 - 31

(vi) 586 - 33

(vii) 735 - 12

(viii) 867 - 34

(ix) 268 - 117

(x) 698 - 454

(xi) 345 - 124

(xii) 758 - 631

(xiii) 368 - 256

(xiv) 579 - 254

(xv) 299 - 155

(xvi) 797 - 555






3rd Grade Math Lessons

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