Question

Решить примеры 1) 321×275-(765920-249320)÷900×107 2) Х•7=7•6 3) 2891-с=665:7

Answer 1

1) 1. 765920-249320=516600
2. 321*275=88275
3. 516600:900=57,4
4. 57,4*107=6141,8
5. 88275-6141,8=82133,2

Answer 2

321×275-(765920-249320)÷900×107 = = 88,275 - (516,600 ÷ 900 × 107) = = 88,275 - (516,600 ÷ 900 × 107) = = 88,275 - 61,102 = = 27,173

Х•7=7•6 => Х = (7•6)/7 = 6

2891 - с = 665 : 7 => 2891 - с = 95 => -с = 95 - 2891 => -с = -2796 => c = 2796