Question

помогите пожалуйста ​

Answer 1

$(18 + 560 \div 8 - 320 \div 40) \times 6 - 40 \times 6 \div 30 \times 50 = \\ (18 + 70 - 8) \times 6 - 240 \div 30 \times 50 = \\ 80 \times 6 - 8 \times 50 = \\ 480 - 400 = 80$