Advertisements
Advertisements
Question
Find the square of 391
Sum
Advertisements
Solution
(391)2 = (400 − 9)2
= (400)2 + 92 + 2 (400) (9)
= 160000 + 81 − 7200
= 152881
shaalaa.com
Is there an error in this question or solution?
APPEARS IN
RELATED QUESTIONS
Find the square of x+ 3y
Find the square of 9.7
Write the place name and place value of digit in the following number.
7,82,899
Write the place value of the underlined digit.
3,52,749
Write the following numbers in standard notation.
200000 + 7000 + 7
Write the following numbers in expanded from.
63,570
Represent given values in Abacus.
3 Ten crores, 7 crores, 6 ten lakhs, 7 lakhs, 4 tens and 7 ones.
Represent given values in Abacus.
Write in standard form: 7 lakhs + 5 thousands + 4 tens + 3 ones
Find the face value and place value of the digits coloured in the given numbers.
1379
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 |
