Page 51 - Whole Numbers (Addition and Subtraction)

10. (a) Make a copy of Table C.

(b) Write your answers for questions 9(b) and (c) in the table.

(c) Complete this table as far as you can with the information
you now have.

Table C: The differences between the distances covered in
different 10-minute periods

1st and 2nd 2nd and 3rd 3rd and 4th 4th and 5th
Periods
periods periods periods periods

Annie

Ellen

11. Who do you expect will win the race? Why do you think so?

50 minutes after the start of the race, Annie has completed
9 014 m and Ellen has completed 8 952 m.

12. Complete all the tables as far as you can with the information
you now have.

9.2 Be smart with addition and subtraction

1. How much is each of the following?

(a) 1 001 + 999 + 1 001 + 999 + 1 001 + 999 + 1 001 + 999

(b) 1 002 + 998 + 1 002 + 998 + 1 002 + 998 + 1 002 + 998

(c) 1 003 + 997 + 1 003 + 997 + 1 003 + 997 + 1 003 + 997

(d) 1 336 + 664 + 1 336 + 664 + 1 336 + 664 + 1 336 + 664

2. How much is
997 + 997 + 997 + 997 + 997 + 997 + 997 + 997 + 997 + 997?

50