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    E:\Working\Focus_Learning\Math_Genius_1_(05-10-2023)\Open_Files\06_Chap_6\Chap_6
                   \ 11-Sep-2024  Bharat Arora   Proof-6                                    Reader’s Sign _______________________ Date __________

                                       Learning by Doing

                  Objective: To reinforce the concept of expanded form in terms of ‘tens’
                  and ‘ones’.

                  Materials Required: Foam cups, sketch pens

                  Procedure:

                          Take at least 3 foam cups.

                          On the first cup, write 0 to 9 for ones as

                          shown in the illustration.

                          On the second cup, write 10 +, 20 +, 30 +,
                          …, + 90 + as shown alongside for the tens.

                          The teacher will call a random number from

                          11 to 99. Students can make any number
                          from 11 to 99 by turning the cups to line up

                          the numbers.

                          Brain Sizzlers

                      1.   How many 1-digit numbers are there?  ________

                      2.   How many 2-digit numbers are there?  ________
                      3.   How many 2-digit numbers have 1 at its tens place? ________

                          Mental Maths
                     1.  Put the sign (>, < or =) in the boxes.

                         (a)    5 tens and 2 ones                3 tens and 6 ones

                         (b)             83                             90 + 5

                         (c)   0 tens and 8 ones                        30 + 4
                         (d)          90 + 6                               69

                         (e)    3 tens and 3 ones                0 tens and 6 ones

                     2.  How many zeros are used to write numbers from 1 to 100?
                     3.  How will you write 80 in the expanded form?

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