Question

Помогите пожалуйста!!!
Даю 30 баллов!!!
Надо сделать 4 и 7 номер!!!

Answer 1

4.

а)-12,3+8,5-1,9=-5,7

b)-0,636+0,6*0,1=0,024

c)0,6*5/6+(2 2/15-3 5/9)+9,6=781/90

d)(-1 2/3+(-1 1/3))+(-3/11)=-36/11

7.

a)(1 3/4*2/5+3 3/6+9/14)+5/12-10 1/5

(7/4*2/5+24/7+14/9)+5/12-51/5

(7/2*1/5+8*2/3)+5/12-51/5

(7/10+16/3)+5/12-51/5

181/30+5/12-51/5

-15/4

b)3/5÷9/10+3 3/4*2/5-4+2 2/3

3/5÷10/9+15/4*2/5-4+8/3

2/3+3/2-4+8/3

5/6

c)1 7/15*1 4/11+2 8/17+1 1/34-1/2÷(1 2/3-1 1/6)

22/15*15/11+42/17+35/34-1/2÷(5/4-7/6)

2+42/17+35/34-1/2÷1/2

2+42/17+35/34-1

1+7/2

9/2

d)8 1/7+1 5/14÷11+(2 3/4-1 3/8)-3(1 4/5+1 1/5)

57/7+19/14÷1/11+(11/4-11/8)-3((1+1)+(4/5+1/5))

57/7+19/154+11/8-3(2+1)

57/7+19/154+11/8-3*3

57/7+19/154+11/8-9

395/616