Posted by **IVAN** on Monday, February 4, 2008 at 7:45pm.

FIND THE ELAPSED TIME

START 1:43

FINISH 6:20

HOW DO I FIND IT

- math -
**Ms. Sue**, Monday, February 4, 2008 at 7:59pm
6:30 - 1:43

You need to change 6:30 to 5:90 then subtract.

5:90 - 1:43 = ?

We'll be glad to check your answer.

- math -
**IVAN**, Monday, February 4, 2008 at 8:03pm
4 HR AND 47 MIN, WHAT I DONT UNDERSTAND IS WHY DO I CHANGE 6:30 to 5:90, thank you Ms.Sue

- math -
**Ms. Sue**, Monday, February 4, 2008 at 8:37pm
You're welcome. Your answer is right. :-)

The easiest way to subtract 1:43 from 6:30 is to change 6:30 to 5:90 because you can't take 43 from 30 without borrowing.

Thirty minutes after six is the same as 90 minutes after five.

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