find the square root of 20.25 by devision method
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20.25=2025/100
=2025÷5=405÷5=81÷3=27÷3=9÷3=3
so,2025=3×3×3×3×5×5=3×3×5=45
100÷2=50÷2=25÷5=5
so,100=2×2×5×5=2×5=10
therefor 45/10=4.5
=2025÷5=405÷5=81÷3=27÷3=9÷3=3
so,2025=3×3×3×3×5×5=3×3×5=45
100÷2=50÷2=25÷5=5
so,100=2×2×5×5=2×5=10
therefor 45/10=4.5
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