Question

Bai 1: Tinh nhannh

58 x 42 + 32 x 8 + 5 x 16

Answer 1

58 x 42 + 32 x 8 + 5 x 16

= 58 x 42 + 32 x 8 + 5 x 2 x 8

= 58 x42 + 32 x 8 + 10 x 8

= 58 x 42 + ( 32 + 10 ) x 8

= 58 x 42 + 42 x 8

= 42 x ( 58 + 8 )

= 42 x 66

= 2772