Squares and Square Roots

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Presentation transcript:

Squares and Square Roots Objective Find the square and square root of a number

Squaring a Number 42 means 4 x 4 = 16. It is called 4 squared and 16 is called a square number. A square with sides that are 4 long has an area of 16 units2 42 = 16 You can see the reason for calling it 4 squared and why 16 is a square number

Copy and complete this table 32 = 62 = 152 = 302 = 52 = 122 = 252 = 142 = 12 = 202 = 132 = 72 = 112 = 182 = 172 = 102 = 162 = 22 = 92 = 1002 = 82 = 192 =

Answers 32 = 9 62 = 36 152 = 225 302 = 900 52 = 25 122 = 144 252 = 625 142 = 196 12 = 1 202 = 400 132 = 169 72 = 49 112 = 121 182 = 324 172 = 289 102 = 100 162 = 256 22 = 4 502 = 2500 92 = 81 402 = 1600 82 = 64 192 = 361

√16 means ‘the square root of 16’ and √16 = 4 Square Roots √16 means ‘the square root of 16’ and √16 = 4 A square with an area of 16 has sides that are 4 long. Another way to find the square root is you can think, “what number, times itself, equals ____?” Ex. For the √36 you want a number, times itself that equals 36. 6 x 6 = 36 so the square root of 36 is 6.

√9 = √36 = √225 = √900 = √25 = √144 = √625 = √196 = √1 = √400 = √169 = Copy and complete this table √9 = √36 = √225 = √900 = √25 = √144 = √625 = √196 = √1 = √400 = √169 = √49 = √121 = √324 = √289 = √ 100 = √256 = √4 = √2500 = √81 = √1600 = √64 = √361 =

Answers √9 = 3 √36 = 6 √225 = 15 √900 = 30 √25 = 5 √144 = 12 √625 = 25 √196 = 14 √1 = 1 √400 = 20 √169 = 13 √49 = 7 √121 = 11 √324 = 18 √289 = 17 √ 100 = 10 √256 = 16 √4 = 2 √2500 = 50 √81 = 9 √1600 = 40 √64 = 8 √361 = 19