Answer :

(10.3 × 9.7) can be written as (10+0.3)(10-0.3)

using identity -

(10+0.3)(10-0.3) = -

= 100 - 0.09

= 99.91

now (10.7 × 9.3) can be written as (10+0.7)(10-0.7)

using identity -

(10+0.7)(10-0.7) = -

= 100 - 0.49

= 99.51

now putting values in question

(10.3 × 9.7) – (10.7 × 9.3) = 99.91 - 99.51

= 0.40

Rate this question :

<span lang="EN-USKerala Board Mathematics Part I

<span lang="EN-USKerala Board Mathematics Part I

<span lang="EN-USKerala Board Mathematics Part I

<span lang="EN-USKerala Board Mathematics Part I

<span lang="EN-USKerala Board Mathematics Part I

<span lang="EN-USKerala Board Mathematics Part I

<span lang="EN-USKerala Board Mathematics Part I

<span lang="EN-USKerala Board Mathematics Part I

<span lang="EN-USKerala Board Mathematics Part I

<span lang="EN-USKerala Board Mathematics Part I