Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 53 - Math_Genius_V1.0_C3_Flipbook
P. 53

    E:\Working\Focus_Learning\Math_Genius_3_(11-09-2024)\Open_Files\CHAP_03
                 \ 12-Sep-2024  Surender Prajapati   Proof-5                                  Reader’s Sign _______________________ Date __________

                  Write the smaller number below the bigger number and follow the given steps:

                  Step 1: Subtract the ones.         Step 2: Subtract the tens. Step 3: Subtract the hundreds.
                           8 – 1 = 7 ones                     4 – 2 = 2 tens                   3 – 2 = 1 hundred
                  Write 7 in the ones column. Write 2 in the tens column. Write 1 in the hundreds column.

                               H   t    O                       H    t   O                          H   t    O
                               3   4    8                       3    4   8                          3   4    8
                           – 2     2    1                    – 2     2   1                      – 2     2    1
                                        7                            2   7                          1   2    7

                  Thus, 348 – 221 = 127
                  Subtraction with Regrouping

                  Before starting subtraction with regrouping, let us revise the regrouping.

                  regrouping tens to Ones
                  We know that if there are not enough ones in minuend to subtract from, we regroup the

                  numbers 1 ten to 10 ones.                         2 tens 4 ones = 1 ten 14 ones

                                            1 ten = 10 ones

                                          t    O        t   O                                      t   O        t    O

                                          1    0        1  10 0                                    2   4       1  2  14 4
                    1 ten      10 ones                                24           1 ten 14 ones

                  Example 1: Subtract 246 from 452.
                  Solution:  Write the numbers in columns and follow the given steps:
                                Step 1: Subtract the ones.
                                         Since, 6 ones cannot be subtracted             H   t    O

                                         from 2 ones, regroup tens and                       4   12
                                         ones, that is, borrow 1 ten = 10               4   5    2

                                         ones to ones.                               – 2    4    6
                                         So, 5 tens 2 ones = 4 tens 12 ones                      6
                                         Now, 12 ones – 6 ones = 6 ones

                                Step 2: Subtract the tens.                 Step 3: Subtract the hundreds.
                                          4 tens – 4 tens = 0 tens                   4 hundreds – 2 hundreds

                                        H   t    O                                   = 2 hundreds
                                            4   12                                     H    t   O
                                        4   5    2                                          4   12
                                    – 2     4    6                                     4    5   2
                                            0    6                                  – 2     4   6
                                          Thus, 452 – 246 = 206                        2    0   6

                  Mathematics-3                                                                                          51

| 48 49 50 51 52 53 54 55 56 57 58 |