Practice!

Sample Problem

Estimate how long you should take to do the following.

1) The time you take to walk 10 meters.

4 min

4 sec

4 h

2) The time you take to write a word.

2 sec

2 min

2 h

3) The time you take to change into your PJs.

20 sec

20 min

20 h

4) The time you take for a bath.

30 sec

30 h

30 min

5) The time you take to open a door.

3 h

3 sec

3 min

Solution

1) 4 min to walk 10 meters is too long and 4 h is too long so the best answer is 4 sec.

2) 2 min to write a word is too long and so is 2 h. The best answer is 2 sec.

3) 20 min to take off clothes is too long and so is 20 h. The best answer is 20 sec.

4) 30 sec to have a bath is too short and 30 h is too long so the best answer is 30 min.

5) 3 h to open a door is too long and so is 3 min. The best answer is 3 sec.