Page 15 - 新思维数学学生用书3 样章
P. 15

1   Numbers to 1000


               1.2  Comparing and ordering





             We are going to …


             •  compare numbers by looking at the value of each digit in turn

             •  use the inequality symbols is less than, <, and is greater than, >,

                 when comparing two numbers

             •  order numbers from smallest to greatest and from greatest to smallest.




           When you know the value of each digit in a 3-digit number,

           you can compare numbers and use what you find out to put

           them in order. You can also estimate where a number
           belongs on the number line.



              digit  inequality,                      375 is less than

              inequalities                        475. 375 comes before

              is greater than, >                    475 on the number

              is less than, <                                 line.
              symbol





           Exercise 1.2




           1  Complete these pieces from a 1000 square.









                         320                             890                             650












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