Page 20 - ICSE Math 4
P. 20

Rounding Off to the Nearest 1,000

                    To round off  numbers to the nearest 1,000, look at the digits at the hundreds place.

                     •  If it is 4 or less, then write zeros at the hundreds, tens and ones places. Keep the
                          digits at other places as it is.

                     •  If it is 5 or more, then write zeros at the hundreds, tens and ones places. Also, add 1
                          to the digit at the thousands place.

                    Example 15: Round off  (a) 6,578 and (b) 24,352 to the nearest 1,000.
                    Solu  on:     (a)  6,578 is rounded off  to 7,000 since the digit at the hundreds place is 5.

                                  (b)   24,352 is rounded off  to 24,000 since the digit at the hundreds place is 3.





                              Exercise 1.4



                     1.  Round off  the given numbers to the nearest 10.

                           (a) 547                 (b) 6,912              (c) 43,785             (d) 1,90,273

                     2.  Round off  the given numbers to the nearest 100.

                           (a) 496                 (b) 7,319              (c) 75,849             (d) 4,46,755

                     3.  Round off  the given numbers to the nearest 1,000.
                           (a) 7,435               (b) 12,752             (c) 4,75,926           (d) 8,99,128






                           Review Exercise



                      1.  Represent the following numbers on the abacus.
                           (a) 54,208                                     (b) 8,42,739

                      2.  Group the following numbers by pu   ng commas as per the Indian number system
                           and write their number names.

                           (a) 6475                (b) 92087              (c) 549306             (d) 127458

                      3.  Write the following numbers in expanded form, in numbers and in words.

                           (a) 8,347               (b) 15,209             (c) 7,53,621           (d) 7,35,438

                      4.  Arrange the following numbers in ascending order.
                           (a)  32,491; 31,491; 38,149; 32,149; 31,941

                           (b)  9,82,467; 9,82,476; 8,93,756; 8,99,324; 9,92,946


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