Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 59 - Math Genius C2
P. 59

    E:\Working\Orange_Education\Math_Genius_2\Open_Files\Chap_03
                   \ 26-Sep-2025  Bharat Arora   Proof-10                                   Reader’s Sign _______________________ Date __________

                  Step 1.  Since there are not enough ones,                       Step 2.  Then subtract the ones.

                  borrow 1 ten from 3 tens and regroup 10                         14 – 8 = 6 ones

                  ones with 4 ones.                                               Write 6 in the ones column.

                                 t    O                                               t   O

                                 2    14                                              2   14
                                 3    4                                               3    4
                             –        8                                           –        8

                                                                                           6

                  Step 3.   Subtract the tens.                         david: Okay, I understand. Now I will try

                                   2 – 0 = 2 tens                      to subtract 6 from 20.
                                                                       First regroup 1 ten = 10 ones.
                  Write 2 in the tens column.                          Then, subtract 10 – 6 = 4 ones

                                  t   O                                and 1 – 0 = 1 ten

                                  2   14                                                t    O
                                  3    4                                                1    10
                              –        8                                                2    0
                                  2    6                                            –        6

                                                                                        1    4

                  Hence, 34 – 8 = 26.                                  Hence, 20 – 6 = 14.

                  Subtraction of two 2-digit Numbers

                  Let us understand this with some examples.                         Challenge Question
                  example 1: Subtract 36 from 52.                                 I am a  2-digit  number.  My  tens

                  Solution: Write the numbers in columns ac-                      digit is double my ones digit.
                                                                                  If you flip  my  digits,  the  new
                  cording to the place value of digits and sub-                   number is 27 less than me.
                  tract step-wise.                                                What number am I?

                  Step 1.   Subtract the ones.                                                                    t   O
                  Since 2 < 6, borrow 1 ten from 5 tens.                                                          4   12

                  1 ten + 2 ones = 10 ones + 2 ones = 12 ones                                                     5    2

                  Now, 12 – 6 = 6 ones                                                                        –   3    6

                  Write 6 in the ones column.                                                                          6

                  Mathematics-2                                                                                          57

| 54 55 56 57 58 59 60 61 62 63 64 |