September 2021 0 11 Report
Впишите в рамочку пропущенное число: 1) 2,5 ( □x + 3y - 5) = 5x + □y - □ 2) □(8m - □ - 6n) = 24m - 21 - □n
3) 5(9a - 4b + □c) = □a - □b + 10c
4) 2a(□b - 8c - □d) = 6ab - □ac - 10ad
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