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+1 vote
376 views
In 7-9 by Guru (6.1k)  
edited by

3 lessons

+2 votes
by Olympian (1.9k)  

A long lesson about prefixes:

Thanks to RSD Academy



+1 vote
by Olympian (1.9k)  

A tip to remember prefixes:

Thanks to ChemSimplified

0 votes
by Guru (6.1k)  

Exponents

 

Exponents can be used in the real world to make long calculation shorter. For example, in stead of always writing the whole multiplication of a square or cube, areas and volumes are given using exponents when talking about the size of an apartment or the size of a swimming pool or fuel tank of a car. Can you come up with other examples?

Look around in your room. Can you come up with repeated multiplication with items available to you?

 

Let’s learn the theory!

Credit: Math Antics, YouTube

 

Excercises:

 1. Is there a way to write these expressions in a shorter way?

  • -7-7-7-7-7
  • -9 x (-9)
  • 3 x 3 x 4 x 4

 

2. Reduce the following using the square root.

  • (2u)²
  • (4a)²
  • (10t)²

3. Mark the following in a shorter way using exponents.

  • 2 x 2 x 2 x 2 x 2 x 2
  • (-3) x (-3) x (-3) x (-3) x (-3) x (-3) x
  • b x b x b x b x b
  • xxxxxxx
  • y x y… …y x y (18 times y)

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