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cubeandcuberoots.pptxB GV VVGTTFTTRFFFFCDF
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- 2. •To understand cuberoots, first, we must understand cubes…… HOW TO CUBE A NUMBER: To cube a number, just multiply a number by itself 3 times. •For e.g. 3 cubed = 33 = 3 x 3 x 3 = 27 3 3 3
- 3. Some more examplesof cubes: 4 = 64 53 = 125 73 = 343 23 = 8 13 = 1 33 = 27 63 = 216 83 = 512 93 = 729 103 = 1000
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- 5. CUBE ROOTS √❑ Taking the Cuberoot of a perfect cube will give you the dimension of one edge of the cube 3 3 3 √27 = 3 3 3 27
- 6. The Cube RootSymbol!! This is the special symbol that means ‘cube root’. It is the RADICAL symbol (used for square roots also), with a little three to mean cube root. This would be said, the cube root of 27 equals 3.
- 7. CUBE ROOT: Justlike square roots are the opposite of squaring a number, cube roots, are the opposite of cubing a number. A cube root goes in the other direction: INVERSE OPERATIONS 43 3 x x 3
- 8. These are someof the PERFECT CUBES of whole numbers!
- 9. Finding cube rootsusing prime factorisation 8000 = 2x2x2 x 2x2x2 x 5x5x5 So, 8000 = 2 x 2 x 5 3
- 10. FINDING CUBE ROOTSUSING ESTIMATION •Step 1- Form groups of three starting from the right most digit. Example 17 576
- 11. FINDING CUBE ROOTSUSING ESTIMATION •Step 2- Take 576 •The digit is 6 at one’s place. •We will now take 6 as required cube’s one place. Required cube = _6
- 12. FINDING CUBE ROOTSUSING ESTIMATION •Step 3- Then take the other group that is 17. •Cube of 2=8 and cube of 3=27. •So, 17 lies between 2 and 3 and the smallest number between them is 2. •Take 2 as required cube’s tens place Required cube = 26 = Answer
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