Question

Find the value of the following

a. 297 × 17 + 297 × 3

b. 54279 × 92 + 8 × 54279

c. 81265 × 169 – 81265 × 69

d. 3845 × 5 × 782 + 769 × 25 × 218

Answer 1

a. 297 × 17 + 297 × 3 = 297 × (17 + 3)

= 297 × 20 = 5,940

b. 54279 × 92 + 8 × 54279

= 54279 × 92 + 54279 × 8

= 54279 × (92 + 8)

= 54279 × 100 = 5427900

c. 81265 × 169 – 81265 × 69

= 81265 × (169 – 169)

= 81265 × 100 = 8126500

d. 3845 × 5 × 782 + 769 × 25 × 218

= 3845 × 5 × 782 + 769 × 5 × 5 × 218

= 3845 × 5 × 782 + (769 × 5) × 5 × 218

= 3845 × 5 × (782 + 218)

= 19225 × 1000 = 1,92,25,000