Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 40 - Math_Genius_V1.0_C3_Flipbook
P. 40

    E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_02
                 \ 12-Sep-2024               Surender Prajapati   Proof-4                     Reader’s Sign _______________________ Date __________

                  2.  Arrange in columns and find the sum of the following:

                       (a)  2415 + 3120                 (b)  4345 + 2632                 (c)  6302 + 2475
                       (d)  6473 + 3515                 (e)  1243 + 4535 + 1201           (f)  2345 + 1023 + 4001

                  Addition of 4-digit numbers with regrouping

                  example 1:  Find the sum of 3506 and 1225.

                  Solution:  Arrange the numbers in place value columns and add using the following steps:
                                 Step 1: Add the ones.

                                           6 + 5 = 11 ones.
                                           Regroup 11 ones as 1 ten and 1 one

                                            Write 1 in the ones column and carry over 1 ten in the tens column.
                                 Step 2: Add the tens. 1 (carried over) + 0 + 2 = 3 tens                 th H      t   O
                                            Write 3 in the tens column.                                            1

                                 Step 3: Add the hundreds. 5 + 2 = 7 hundreds                             3    5   0    6
                                            Write 7 in the hundreds column.                            + 1     2   2    5

                                 Step 4: Add the thousands. 3 + 1 = 4 thousands                           4    7   3    1
                                            Write 4 in the thousands column.
                                          Thus, the sum of 3506 + 1225 = 4731.

                  example 2: Find the sum of 1076 and 2282.

                  Solution:  Arrange the numbers in place value columns and add using the following steps:
                                 Step 1: Add the ones.                                                   th H      t   O
                                           6 + 2 = 8 ones                                                      1

                                           Write 8 in the ones column.                                    1    0   7    6

                                 Step 2: Add the tens.                                                 + 2     2   8    2
                                           7 + 8 = 15 tens = 1 hundred + 5 tens                           3    3   5    8

                                            Write 5 in the tens column and carry over 1 in the
                                          hundreds column.

                                 Step 3: Add the hundreds.
                                           1 (carried over) + 0 + 2 = 3 hundreds
                                           Write 3 in the hundreds column.

                                 Step 4: Add the thousands.

                                           1 + 2 = 3 thousands
                                           Write 3 in the thousands column.

                                          Thus, the sum of 1076 + 2282 = 3358.

                  38                                                                                    Mathematics-3

| 35 36 37 38 39 40 41 42 43 44 45 |