Упростите выражения: 1) 2 ∙79 ∙ 50 2) 1000 ∙ 12 ∙ 4 3) 3 ∙ 9 + 7 ∙ 9 4) 7 ∙ 2 ∙ 11 ∙5 5) a ∙147 ∙ b 6) 8k×900m 7) 4 ∙s ∙ 3 ∙ x ∙ 5 ∙ p 8) 147×13-3×147 9) 29×16+71×16 10) 8×52 - 5×52 11) 6×a - 2×a 12) 17×m +13×m 13) 5k – 5a 14) 14×k + 9×k + 3×k 15) х + 5х 16) 72×y - 12×y - y 17) y - y 18) 3x+3x 19) 2×n + 7×n + 3 20) 6×x - 6×x + 5. Помогите пж позязя сегодня надо сдать.
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