упростите выражения
1/6(4а -2)- 1/5 (5b+6)
и найдите его значения при а =2 1/4, b= 4/5 .
1/6(4а -2)- 1/5 (5b+6) =4/6a-2/6 - b-6/5 = 2/3a-b-1/3-6/5=2/3a-b-1 8/15.
при а =2 1/4, b= 4/5 => 2/3*2 1/4-4/5-1 8/15= 2/3*9/4 - 4/5 - 1 8/15 =
= 3/2-4/5 -1 8/15=15/10 - 8/10 - 1 8/15= 7/10 - 1 8/15 = -(1 8/15 - 7/10)=
= -(1 16/30-21/30) = -(46/30-21/30) = -25/30= -5/6.
-5/6
Пошаговое объяснение:
1/6(4a-2)-1/5(5b+6) при a = 2 1/4 = 9/4; b = 4/5
1/6(4a-2)-1/5(5b+6) = 2/3а - 1/3 - b - 6/5 = 2/3а - b - 5/15 - 18/15 =
2/3а - b - 23/15 = 2/3а - b - 1 8/15
2/3а - b - 1 8/15 = 2/3*9/4 - 4/5 - 1 8/15 = 3/2 - 4/5 - 1 8/15 =
45/30 - 24/30 - 1 16/30 = -25/30 = -5/6
упростите выражения
1/6(4а -2)- 1/5 (5b+6)
и найдите его значения при а =2 1/4, b= 4/5 .
1/6(4а -2)- 1/5 (5b+6) =4/6a-2/6 - b-6/5 = 2/3a-b-1/3-6/5=2/3a-b-1 8/15.
при а =2 1/4, b= 4/5 => 2/3*2 1/4-4/5-1 8/15= 2/3*9/4 - 4/5 - 1 8/15 =
= 3/2-4/5 -1 8/15=15/10 - 8/10 - 1 8/15= 7/10 - 1 8/15 = -(1 8/15 - 7/10)=
= -(1 16/30-21/30) = -(46/30-21/30) = -25/30= -5/6.
-5/6
Пошаговое объяснение:
1/6(4a-2)-1/5(5b+6) при a = 2 1/4 = 9/4; b = 4/5
1/6(4a-2)-1/5(5b+6) = 2/3а - 1/3 - b - 6/5 = 2/3а - b - 5/15 - 18/15 =
2/3а - b - 23/15 = 2/3а - b - 1 8/15
2/3а - b - 1 8/15 = 2/3*9/4 - 4/5 - 1 8/15 = 3/2 - 4/5 - 1 8/15 =
45/30 - 24/30 - 1 16/30 = -25/30 = -5/6