Answer :

(i)

(100 + 2) (100 + 6)

= 100 (100 + 6) + 2 (100 + 6)

= 10000 + 600 + 200 + 12

= 10812

(ii)

This can be written as:

(100 + 9) (100 + 7)

= 100 (100 + 7) + 9 (100 + 7)

= 10000 + 700 + 900 + 63

= 11663

(iii)

This can be written as:

(30 + 5) (30 + 7)

= 30 (30 + 7) + 5 (30 + 7)

= 900 + 210 + 150 + 35

= 1295

(iv)

This can be written as:

(50 + 3) (50 + 5)

= 50 (50 + 5) + 3 (50 + 5)

= 2500 + 250 + 150 + 15

= 2915

(v)

This can be written as:

(100 + 3) (100 - 4)

= 100 (100 - 4) + 3 (100 - 4)

= 10000 - 400 + 300 - 12

= 10000 – 112

= 9888

(vi)

This can be written as:

(30 + 4) (30 + 6)

= 30 (30 + 6) + 4 (30 + 6)

= 900 + 180 + 120 + 24

= 1224

(vii)

This can be written as:

(1000 - 6) (1000 + 6)

= 1000 (1000 + 6) - 6 (1000 + 6)

= 1000000 + 6000 - 6000 - 36

= 999964

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