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प्रश्न
Evaluate using the expansion of (a + b)2 or (a – b)2 :
(20.7)2
बेरीज
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उत्तर
(20.7)2 = (20 + 0.7)2
= (20)2 + (0.7)2 + 2 (20) (0.7)
= 400 + 0.49 + 28
= 428 + 0.49
= 428.49
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संबंधित प्रश्न
Expand : (a – 2b)2
Find the square of `2"x"+1/"x"+1`
Write the place value of the underlined digit.
78,95,210
Write the place name and place value of digit in the following number.
7,82,899
The expanded form of the number is given. Write the number.
60,000 + 4000 + 600 + 70 + 9
The expanded form of the number is given. Write the number.
80,00,000 + 50,000 + 1000 + 600 + 9
Find the face value and place value of the digits coloured in the given numbers.
2010
Complete the given table.
| Number | Expanded Form | |
| a | 6785 | |
| b | 4000 + 200 + 90 + 6 | |
| c | 3000 + 300 + 20 + 7 | |
| d | 9999 | |
| e | 5000 + 70 + 1 | |
| f | 2934 |
Circle the correct one.
| a | 5 thousand + 3 hundred + 2 ones | 5320, 5302 |
| b | The place value of 5 in 3758 | 50, 500 |
| c | Three thousand six hundred and sixty | 3060, 3660 |
| d | 4000 + 600 + 90 | 4690, 4609 |
Write in expanded form:
8907010
