Пожалуйста,помогите!. Created by Silaevazlata. matematika-ru

Пожалуйста,помогите!...

пимочка №1.
1) 11/15 - 1 9/10 = 22/30 - 1 27/30 = -(1 27/30 - 22/30) = -1 5/30 = -1 1/6
2) -1 1/6 + 5/18 = - 1 3/18 + 5/18 = -21/18 + 5/18 = - 16/18 = - 8/9
3) -8/9 * 0,9 = -8/9 * 9/10 = -8/10 = -0,8
4) -0,8+0,1=-0,7
№2.
1) 7/15 - 1 1/12 = 28/60 - 1 5/60 = -(1 5/60 - 28/60) = - (65/60 - 28/60) = -37/60
2) -37/60 + 9/20 = -37/60 + 27/60 = -10/60 = -1/6
3) 0,2: (-1/6) = 2/10 : (-1/6) = 2/10 * (-6) =-1,2
4) 0,8+(-1,2)=-0,4

2 votes Thanks 1

iriska124 Пример 1
1)11\15-1 9\10=11\15-19\10=11*10-19*15\150=-175\150
2)-175\150+5\18=-175*18+5*150\2700=-3150+750\2700=-2400\2700=-24\27
3)-24\27*0,9=-24\27*9\10 =-12\15
4)-12\15+0,1 =-12\15+1\10 =-12*10+1*15\150=-120+15\150=-105\150=-0,7
Ответ ----- (-0,7)
Пример 2
1)7\15-11\12=7\15-13\12=7*12-13*15\180=84-195\180=-111\180
2)-111\180+9\20 =-111+9*9\180=-30\180=-3\18=-1\6
3)0,2\-1\6=1\5*(-6\1)=-6\5=-1,2
4)0,8+(-1,2)=-0,4
Ответ --- (-0,4)

1 votes Thanks 1

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