Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 55 - Math Genius C2
P. 55

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

                  Subtracting a number from itself
                  When we subtract a number from itself, the difference is 0.

                  (a)  15 – 15 = 0         (b)  28 – 28 = 0          (c) 79 – 79 = 0

                     www
                         MAths connect                                                                          Collaborative Learning
                     Makar  Sankranti  is  one of the  most  popular festivals
                     in India. Children celebrate it as Kite Flying Day. Some             6–1        17–0       16–9

                     kites  are flying  in  the  sky.  Each  kite has  a  subtraction
                     problem. Solve the problems and note their answers. If                 21–10         15–15
                     the answer is 0, the kite will come down, else it goes

                     up.

                     Now, write the number of kites:

                     Going up =            Coming down =

                  SUBTRACTION ON The NUmBeR lINe

                  Daisy and Bela need to colour some chart paper with                               Math Insight

                  different crayons. Daisy has 40 crayons. Bela takes away 13                 Unlike addition, we jump
                                                                                              backwards while subtracting
                  crayons from Daisy and asks her how many crayons are left.                  on a number line.

                  Daisy calculates the remaining crayons in the following way.
                  Let us start from 40 and count 13                                    –1  –1 –1 –1 –1  –1 –1 –1 –1  –1 –1 –1 –1

                  steps backwards. We reach 27. Thus,                  21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
                  40 – 13 = 27.

                  Bela shows another way. As 13 = 10 + 3, start from 40 and take a jump of 1 ten
                  backwards. Then, move 3 steps backwards.

                  Thus,  40 – 13 = 40 – 10 – 3
                                    = 30 – 3 = 27                      21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
                                                                                          –1 –1
                                                                                       –1
                  Hence, both find that 27 crayons are left.

                          Life Skills                                                                           Cross-Curricular Learning

                      Riya is counting her body parts. Solve the subtraction sum and know how many
                      parts she counts.
                      1.  I have 20 – 10 = __ fingers. 2. I have 8 – 4 = __ limbs.      3. I have 30 – 29 = __ nose.
                      4.  I have 19 – 09 = __ toes.  5. I have 5 – 3 = __ elbows.  6. I have 33 – 31 = __ eyes.

                  Mathematics-2                                                                                          53

| 50 51 52 53 54 55 56 57 58 59 60 |