Выражение 1) 1.3(0,3a-0,6)-1/4(0,4a-0,8) 2)c-2(c-d+2c) 3)-4(x-y)+2(x+3y) 4)2(a-b)-4(b-a) 5)3,2(c+d)+5,8(c-d) - id493970920210514 от vicky03 14.05.2021 07:03

Question

Математика: Выражение 1) 1.3(0,3a-0,6)-1/4(0,4a-0,8) 2)c-2(c-d+2c) 3)-4(x-y)+2(x+3y) 4)2(a-b)-4(b-a) 5)3,2(c+d)+5,8(c-d) 6)2/9(1,8m-5,4)-3/7(2,1m-4,2) help p.s: / значит дробь

vicky03 · Accepted Answer

1) 1 7/9 * (15/32 : 1 19/36) = 6/11  1) 15/32 : 1 19/36 = 15/32 : 55/36 = 15/32 * 36/55 = (3*9)/(8*11) = 27/88 2) 1 7/9 * 27/88 = 16/9 * 27/88 = (2*3)/(1*11) = 6/11 2) 3 4/7 : 1 1/7 * 2/3 = 2 1/12 1) 3 4/7 : 1 1/7 = 25/7 : 8/7 = 25/7 * 7/8 = 25/8 2) 25/8 * 2/3 = (25*1)/(4*3) = 25/12 = 2 1/12  3) 3 4/7 : (1 1/7 * 2/3) = 4 11/16 1) 1 1/7 * 2/3 = 8/7 * 2/3 = 16/21 2) 3 4/7 : 16/21 = 25/7 * 21/16 = (25*3)/(1*16) = 75/16 = 4 11/16 4) (5/12 + 1/8) : 3/8 = 1 4/9 1) 5/12 + 1/8 = 10/24 + 3/24 = 13/24 2)...

Выражение 1) 1.3(0,3a-0,6)-1/4(0,4a-0,8) 2)c-2(c-d+2c) 3)-4(x-y)+2(x+3y) 4)2(a-b)-4(b-a) 5)3,2(c+d)+5,8(c-d) 6)2/9(1,8m-5,4)-3/7(2,1m-4,2) help p.s: / значит дробь

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