Question

With out actual multiplication, find the value of 1.09 x 0.91

Answer 1

Answer:

0.9919

Step-by-step explanation:

1.09 * 0.91

= (1+0.09) * (1-0.09) [a^2 - b^2 = (a+b)*(a-b)]

= 1^2 - (0.09)^2

= 1 - 0.0081

= 0.9919

hope it helps !

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Answer 2

Answer:

0.1

step by step explainetion

109/100 × 91/100

x-90x/100=xx

(100-90)/100=xx

10x/100=xx

x/100 =xx

x=1/10

so X =0.1 is a answer