Question

please answer my. question

Answer 1

(ii) 5×3996×20×2
= (5×20)×(3996×2)
= 100 ×7992
= 799200
(iii) 2×9897×5
= (2×5)×9897
=10 ×9897
=98970
(iii) 725 ×8×50×20
= (725×8)×(50×20)
= 5800×1000
= 5800000