Question

Помогите пожалуйста решить
Заранее спасибо)

Answer 1

1.

(1 1/4×2,6-4)÷1,2+0,3

(1/4×13/5-4)÷6/5+3/10

(13/20-4)÷6/5+3/10

(-67/20)÷6/5+3/10

-67/20×5/6+3/10

-67/4×1/6+3/10

-67/24+3/10

-229/120=2 59/120≈2,49167

2.

0,25+1/12÷(1/3×1,25-9/16)

1/4+1/12÷(1/3×5/4-9/16)

1/4+1/12÷(5/12-9/16)

1/4+1/12÷(-7/48)

1/4-1/12×48/7

1/4-4/7

-9/28≈-0,321429

3.

2/9÷0,8-0,5/1,6×0,25

2/9÷4/5-1/2/0,4

2/9×5/4-1/2/2/5

1/9×5/2-1/2/2/5

5/18-1/2/2/5

-2/9/2/5

2/9-/2/5

-5/9≈-0,555556

4.

2 3/4÷(1 1/2-2/5)+(3/4+5/6)÷3 1/6/(3 1/2÷4 2/3+4 2/3÷3 1/2)×4 4/5

3/2÷(1/2-2/5)+19/12×1/3×1/6/(1/4+4×1/3×1/3)×4×4/5

3/2÷1/10+19/216/(1/4+4/9)×4×4/5

3/2×10+19/216/25/36×4×4/5

3×5+19/216/5/9×4

15+19/216/20/9

3259/216/20/9

3259/480=6 379/480=6,789583

5.

(2/15+712)×30/43-(2÷2 1/2)×5/32/(11 5/11-8 21/22)÷1 2/3

43/60×30/43-(1 1/2)×5/32/(5-4 21/11)÷1 2/3

1/2-1/2×5/32/(5-84/11)÷1 2/3

1/2-5/64/-29/11×2/3

27/64/-58/33

27/64-/58/33

-891/3712≈-0,340032

6.

3/4÷5/6+2 1/2×2/5-1÷1 1/6/((1 1/2)^3-3/4)÷7/8

3/4×6/5+2/5-1 1/6/((1/2)^3-3/4)×8/7

3/2×3/5+2/5-1/6/(1/8-3/4)×8/7

9/10+2/5-1/6/-5/8×8/7

17/15/-5×1/7

17/15/-5/7

17/15-/5/7

-119/75=-1 44/75≈-1,58667

7.

227,36÷(865,6-20,8×40,5)×8,38+1,12

227,36÷(865,6-842,4)×8,38+1,12

227,36÷23,2×8,38+1,12

82,124+1,12

83,244=20811/250=83 61/250