Squares and Square Roots Year 6/7. Square Numbers How to Square A Number To square a number, just multiply it by itself... Example: What is 3 squared?

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Presentation transcript:

Squares and Square Roots Year 6/7

Square Numbers How to Square A Number To square a number, just multiply it by itself... Example: What is 3 squared? 3 Squared = = 3 × 3 =

Square Numbers "Squared" is often written as a little 2 like this: This says "4 Squared equals 16" (the little 2 says the number appears twice in multiplying)

Squares From 1 2 to Squared = 1 2 = 1 × 1 = 1 2 Squared = 2 2 = 2 × 2 = 4 3 Squared = 3 2 = 3 × 3 = 9 4 Squared = 4 2 = 4 × 4 = 16 5 Squared = 5 2 = 5 × 5 = 25 6 Squared = 6 2 = 6 × 6 = 36

You can also find the squares on the Multiplication Table:

Square Roots A square root goes the other way: 3 squared is 9, so a square root of 9 is 3

Square Roots  A square root of a number is a value that can be multiplied by itself to give the original number. A square root of 9 is , because when 3 is multiplied by itself you get 9. It is like asking: What can I multiply by itself to get this? Eg. The square root of 16 = ? What can I multiply by itself to get 16?

Square Roots matched with their square Square RootSquare ? ?25 ?36 7? ??