Question

Tính bằng cách thuận tiện:

a) 125x(8x123)

b) 55x739+55x261-5000

Giúp mk vs

Answer 1

a) 125 x (8 x 123)

= (125 x 8) x 123

= 1000 x 123

= 123000

b) 55 x 739 + 55 x 261 - 5000

= 55 x (739 + 261) - 5000

= 55 x 1000 - 5000

= 55000 - 5000

= 50000

Answer 2

a) 125 × (8 × 123)

= (125 × 8) × 123

= 1000 × 123

= 123000

b) 55 × 739 + 55 × 261 - 5000

= 55 × (739 + 261) - 5000

= 55 × 1000 - 5000

= 55000 - 5000

= 50000