Page 17 - Math_Genius_V1.0_C4_Flipbook
P. 17

E:\Working\Focus_Learning\Math_Genius_4_(25-10-2023)\Open_Files\Chap-01
              \\December 6, 2023 1:30 PM   Bharat Arora   P-6           Reader _________________________   Date: ___________________74





              Now, if we add the place values of each digit together, then we get

                  100000 + 20000 + 4000 + 500 + 80 + 7 = 1,24,587 ← Short Form
              Inversely, we can express the number as the sum of place values of each digit as:

                  1,24,587 = 100000 + 20000 + 4000 + 500 + 80 + 7 ← expanded Form

              example 2:  Express the following numbers in their expanded form.

                    (a)  23498              (b)  64021               (c)  578587             (d)  983198

              Solution:
                    (a)  We can express 23498 in the expanded form as

                         23498 = 2 × 10000 + 3 × 1000 + 4 × 100 + 9 × 10 + 8 × 1

                             = 20000 + 3000 + 400 + 90 + 8

                    (b)  We can express 64021 in the expanded form as

                         64021 = 6 × 10000 + 4 × 1000 + 0 × 100 + 2 × 10 + 1 × 1

                             = 60000 + 4000 + 20 + 1

                    (c)  We can express 578587 in the expanded form as

                         578587 = 5 × 100000 + 7 × 10000 + 8 × 1000 + 5 × 100 + 8 × 10 + 7 × 1

                             = 500000 + 70000 + 8000 + 500 + 80 + 7

                    (d)  We can express 983198 in the expanded form as

                         983198 = 9 × 100000 + 8 × 10000 + 3 × 1000 + 1 × 100 + 9 × 10 + 8 × 1

                            = 900000 + 80000 + 3000 + 100 + 90 + 8

              example 3:  Write the numbers in their short form.

                    (a)  40000 + 8000 + 900 + 90 + 1                                  Quick Check

                    (b)  700000 + 30000 + 5000 + 100 + 20 + 8                      Fill in the blanks.
                    (c)  800000 + 4000 + 600 + 30 + 2                              1.   200000 + ______ + 100 +

                    (d)  600000 + 90000 + 7                                            60 + ____ = 250169

              Solution:                                                            2.   3 × 10000 + 7 × 1000 +
                                                                                       6 × 100 + 8 × 1 = ______
                    (a)   40000 + 8000 + 900 + 90 + 1 = 48,991

                    (b)  700000 + 30000 + 5000 + 100 + 20 + 8 = 7,35,128
                    (c)   800000 + 4000 + 600 + 30 + 2 = 8,04,632

                    (d)  600000 + 90000 + 7 = 6,90,007

               teacher’s   Explain to the students that zero is the only digit whose place value is always zero, irrespective of the place it
                  tip      occupies in the number. For example, in 55077, the place value of 0 in the hundreds place is zero.



              Mathematics-4                                                                                          15
   12   13   14   15   16   17   18   19   20   21   22