Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 59 - Touchpad Mathematics V1.0 C1
P. 59

    D:\Working\TouchPad_Maths\TouchPad_Maths_1\Open_Files\Chap_04\Chap_04
                   \ 17-Nov-2025     Surender Singh Rothan   Proof-7                           Reader’s Sign _______________________ Date __________

                    SubtrACtion by Counting bACk

                    Let us find 8 – 5.

                    To find 8 – 5, put your finger on 8 and move back 5 steps. You will reach 3.

                                                         5       4      3      2      1

                                        1      2      3      4      5      6      7      8      9      10

                                                                       5
                    So,                                      8    –       =         3

                                Exercise 4C

                    Subtract the following by counting back. one has been done for you.

                              1    2    3   4    5    6    7    8   9 10 11 12 13 14 15 16 17 18 19 20

                      1.  7 – 2  =  5            2.  18 – 4 =              3.  9 – 6  =             4.  16 – 1  =

                      5.  14 – 2 =               6.  12 – 1  =             7.  18 – 5  =            8.  8 – 2  =

                      9.  18 – 1  =            10.  19 – 4 =              11.  20 – 7 =            12.  15 – 5 =

                      13.  13 – 7 =             14.  14 – 8 =            15.  16 – 5 =             16.  19 – 8 =

                    SubtrACtion fACtS

                    Count the number of objects that are not crossed and fill in the boxes.

                              Subtraction facts of 1                               Subtraction facts of 2

                                      1 – 0 = 1                                                        2  –  0  =  2
                                                                                                       2  –  1  =  1
                                       1 – 1 = 0
                                                                                                       2  –  2  =  0

                              Subtraction facts of 3                               Subtraction facts of 4
                                                  3  –  0  =  3                                        4  –        =  4

                                                  3  –  1  =                                               –  1  =  3

                                                      –  2  =  1                                           –       =  2
                                                      –       =                                        4  –  3  =

                                                                                                           –       =  0

                                                                                                                  57
                                                                                           Subtraction up to 20

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