Page 49 - Whole Numbers (Addition and Subtraction)

Unit Whole nUmbers:
9 Addition And sUbtrAction

9.1 Add and subtract distances

Annie and Ellen compete in a race over 10 000 m.

0 1 000 2 000 3 000 4 000 5 000 6 000 7 000 8 000 9 000 10 000
During the first 10 minutes of the race,
Annie runs 1 867 m and Ellen runs 1 768 m.

During the second 10 minutes of the race,
Annie runs 1 835 m and Ellen runs 1 778 m.

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

2. (a) How far from the starting point is Annie after 20 minutes?
(b) How far from the endpoint is Annie after 20 minutes?

(c) How far is the gap between Annie and Ellen after
20 minutes?

After 30 minutes, Annie has covered 5 504 m of the race, and
Ellen has covered 5 345 m.

3. (a) How far has Annie run during the third 10 minutes?

(b) How far has Ellen run during the third 10 minutes?

(c) How much further than Ellen has Annie run during the
third 10-minute period?

4. Approximately how long, to the nearest 10 minutes, do you
think Ellen will need to complete the race?

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

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