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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