Addition of 3-Digit numbers without Regrouping

We will learn Addition of 3-Digit Numbers without Regrouping.

We know how to do addition of 3-digit numbers without regrouping. Let us recall it solving some examples.


Solved Examples on Addition of 3-Digit Numbers without Regrouping:

Addition of Two 3-Digit Numbers

1. The shopkeeper has 153 packets of chocolate cookies and 124 butter cookies. How many cookies are there in all?

Solution:

To find out the total number of cookies, we will perform addition.

Step 1: First add the ones.

             3 + 4 = 7

Step 2: Next add the tens.

            5 + 2 = 7

Step 3: Then, add the hundreds.

            1 + 1 = 2

Addition of 3-digit Numbers without Regrouping

Thus, there are 277 cookies in the shop.



2. Add 641 and 325.

Solution:

Step 1: Arrange the numbers vertically.

Step 2: First add the ones.

           1 + 5 = 6

Step 3: Now, add the tens.

            4 + 2 = 6

       Lastly, add the hundreds.

            6 + 3 = 9

Addition of Three-digit Numbers without Regrouping

Thus, 641 + 325 = 966

Addition of Three 3-Digit Numbers Without Regrouping:

We will add three 3-digit numbers in the same way as we add two 3-digit numbers.

For examples:

1. Add 542, 234 and 103.

Solution:

Step 1: Arrange the numbers vertically.

Step 2: First add the ones. 2 + 4 + 3 = 9 

Step 3: Now, add the tens. 4 + 3 + 0 = 7

Step 4: Lastly, add the hundreds. 5 + 2 + 1 = 8

Thus, 542 + 234 + 103 = 879

Questions and Answers on Addition of 3-digit Numbers without Regrouping:

I. Add the following:

(i) 452 + 7

(ii) 238 + 61

(iii) 601 + 25

(iv) 758 + 31

(v) 604 + 33

(vi) 576 + 12

(vii) 934 + 40

(viii) 457 + 22

(ix) 460 + 506

(x) 251 + 238

(xi) 261 + 437

(xii) 384 + 112

(xiii) 708 + 191

(xiv) 348 + 321

(xv) 709 + 190

(xvi) 652 + 246

(xvii) 230 + 367

(xviii) 323 + 475

(xix) 832 + 131

(xx) 450 + 238


Answer:

I. (i) 459

(ii) 299

(iii) 626

(iv) 789

(v) 637

(vi) 588

(vii) 974

(viii) 479

(ix) 966

(x) 489

(xi) 698

(xii) 496

(xiii) 899

(xiv) 669

(xv) 899

(xvi) 898

(xvii) 597

(xviii) 798

(xix) 963

(xx) 688


II. Add the following and fill in the blanks:

(i) 503 + 6 = __________ 

(ii) 142 + 7 = __________ 

(iii) 674 + 23 = __________ 

(iv) 256 + 42 = __________ 

(v) 725 + 214 = __________ 

(vi) 345 + 153 = __________ 

(vii) 854 + 144 = __________ 

(viii) 615 + 212 = __________ 

(ix) 600 + 199 = __________ 


Answer:

II. (i) 503 + 6 = __________ 

(ii) 142 + 7 = __________ 

(iii) 674 + 23 = __________ 

(iv) 256 + 42 = __________ 

(v) 725 + 214 = __________ 

(vi) 345 + 153 = __________ 

(vii) 854 + 144 = __________ 

(viii) 615 + 212 = __________ 

(ix) 600 + 199 = __________ 

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