Examples

= Example 1=

The human eye blinks about 25 times a minute. If Luke watched television from 6pm until 8:45pm, how many times did his eye blink during this time?
Solution Find how many minutes there are between 6 pm and 8:45pm. Answer: There are 2 hours and 45 min. between the two times. 2 hours = 120 min + 45 min = 165 min

Multiply 25 blinks/ min by 165 min = 4125 blinks Luke's eye blinks about 4125 times.

= Example 2 =

I am going to Moncton and it's 310 kms from Centreville to Moncton. It take me 2hrs and 45 minutes to get there. What was my average speed?
Solution First, I need to change my time traveled to a decimal. 2 hrs and 45 minutes = 2 and 3/4 hrs or 2.75hrs.

Next, I need to divide my distance traveled by my time traveled 310km / 2.75hrs = 112.7272 kms/hr

So, I was traveling at an average speed of about 112.72 kms/hr

=//Example 3//=

Laura has 3 green chips, 4 blue chips and 1 red chip in her bag. What fractional part of the bag of chips is green?
= Solution =

Determine the total number of chips there are by adding 3 + 4 + 1 = 8
This is the denominator of your fraction which represents the WHOLE. Count the number of green chips (3) which is the PART and this is your numerator. Therefore your answer is 3/8

=Example 4=


 * I am an atronomer and my camera lens is 1.372 m across. My friend George is a spy and he has a camera lens of 2.9 cm across. My aunt Marie is a surgeon and she has a lens 1.5 cm across.**

= Solution = = = 1) 1.372m 1.5 cm = 0.015m 1.372m - 0.015m = 1.357 m It is 1.357 m greater than Marie's. 2) 0.029m - 0.015m = 0.014 m Marie's camera is 0.014 m less than George's. 3) 1.372 / 0.029 = 47.3 47 of George's lens would fit across mine.
 * 1) How many more __metres__ across is my camera lens than Marie's? Hint!!!! Use the same units. **
 * 2) How many fewer __metres__ across is Marie's camera lens than George's? **
 * 3) Around how many of George's camera lens would fit across mine?**