Q. 4 E

Compute the following differences:

(11.3 × 10.7) – (11.7 × 10.3)

Answer :

(11.3 × 10.7) can be written as (11+0.3)(11-0.3)

using identity -


(11+0.3)(11-0.3) = -


= 121 - 0.09


= 120.91


now (11.7 × 10.3) can be written as (11+0.7)(11-0.7)


using identity -


(11+0.7)(11-0.7) = -


= 121 - 0.49


= 120.51


now putting values in question


(11.3 × 10.7) – (11.7 × 10.3) = 120.91- 120.51


= 0.40


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