Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 23 - Touchpad Mathematics V1.0 C1
P. 23

    D:\Working\TouchPad_Maths\TouchPad_Maths_1\Open_Files\Chap_02\Chap_02
                   \ 17-Nov-2025     Surender Singh Rothan   Proof-7                           Reader’s Sign _______________________ Date __________

                    Let us show some 2-digit numbers on the abacus.

                       10 has 1 ten and 0 ones.  15 has 1 ten and 5 ones.  18 has 1 ten and 8 ones.

                                 T      O                           T      O                           T     O

                     1 bead in the tens spike  1 bead in the tens spike  1 bead in the tens spike
                        shows 1 ten and no                  shows  1 ten and 5                 shows 1 ten and 8

                     beads in the ones spike  beads in the ones spike  beads in the ones spike
                           means 0 ones.                      means 5 ones.                      means 8 ones.

                                Exercise 2D

                      1.   Write the numbers shown on the abacus. One has been done for you.
                           a.                      b.                      c.                      d.

                                     T     O                 T     O                 T     O                 T     O

                                        17

                      2.   draw beads to show the given numbers.

                           a.                      b.                      c.                      d.

                                     T     O                 T     O                 T     O                 T     O

                                       15                      16                       18                     19

                                                                                                                  21
                                                                                             Numbers up to 20

| 18 19 20 21 22 23 24 25 26 27 28 |