without directly multiplying evaluate the following
a) 0.99 x 0.99
b) 0.64 x 0.64-0.36 x 0.36
c) 1.54 x 1.54+ 2 x 1.54 x 1.46 + 1.46 x 1.46
d) 3.53 x 3.53-3.47x3.47
0.06
e) 6.82 x 6.82-1.18 x 1.18
5.64
sam11oscar:
the largest 5 digit no is 99999. when it is divided by 8 it leaves a remainder 7. but we need remainder as 5.so reduce 2 (7-5) from 99999. ie,99997 is the largest 5 digit no which when divided by 8 leaves a remainder 5 and which when divided by 7 leaves a remainder 2.
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1) 0.99^2 = (1- 0.01)^2 = 1 -2x 1x0.01 + 0.01^2 = 1-0.02 + 0.0001 = 0.9801ans. 2) 0.64^2 - 0.36^2 = (.64+.36)(.64-.36)= 1x.28 = 0.28answer Same properties in other questions
the largest 5 digit no is 99999. when it is divided by 8 it leaves a remainder 7. but we need remainder as 5.so reduce 2 (7-5) from 99999. ie,99997 is the largest 5 digit no which when divided by 8 leaves a remainder 5 and which when divided by 7 leaves a remainder 2.
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1. 0.99 x 0.99 = 0.9801
2. 0.64 x 0.64-0.36 x 0.36 = 0.28
3. 1.54 x 1.54+ 2 x 1.54 x 1.46 + 1.46 x 1.46 = 9
4. 3.53 x 3.53-3.47x3.47 = ?
0.06
5. 6.82 x 6.82-1.18 x 1.18 = ?
5.64
Sorry I don't know the answers of 4 and 5
2. 0.64 x 0.64-0.36 x 0.36 = 0.28
3. 1.54 x 1.54+ 2 x 1.54 x 1.46 + 1.46 x 1.46 = 9
4. 3.53 x 3.53-3.47x3.47 = ?
0.06
5. 6.82 x 6.82-1.18 x 1.18 = ?
5.64
Sorry I don't know the answers of 4 and 5
mark as the best answer plz
It's not too hard I'll explain
(3.53+3.47)(3.53-3.47)/0.06=7x0.06/0.06=7 answer
5th is same as 4
the largest 5 digit no is 99999. when it is divided by 8 it leaves a remainder 7. but we need remainder as 5.so reduce 2 (7-5) from 99999. ie,99997 is the largest 5 digit no which when divided by 8 leaves a remainder 5 and which when divided by 7 leaves a remainder 2.
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