Question

2. Find the squares of the following numbers without actual multiplication:
(1) 9
(1) 0.1
(H) 2.9
(iv) 49
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Answer 1

1 81. .01. H 8.41. 2401

These are the final answers of the question asked by you

Answer 2

Answer:

1) 9

9=8+1

8(8+1)+1(8+1)

8×8+8×1 + 8×1+1×1

64+8 +8+1

72+9

81

3) 2.9

2.9=2.0+9

2.0(2.0+9) + 9(2.0+9)

2.0×2.0+2.0×9 + 9×2.0+9×9

4.00+1.80 + 1.80+81

5.80+2.61

4) 49

40+9

40(40+9) + 9(40+9)

40×40+40×9 + 9×40+9×9

1600+360+360+81

1960+441

2401