1)b = 1,55 x 25/31 + 3 29/30 : 0,4 = 1,55 x 25/31 + 119/30 : 0,4b = 1,55 x 25/31 + 119/30 / 0,4b = 39,25/31 + 119/30 / 0,4b = 1,26 + 3,96666 / 0,4b ≈ 1,26 + 9,9167b ≈ 11,177
Ответ: b ≈ 11,177
2)-b = (13 1/32 - 9 9/16) / 27,75 + 1,375-b = (415/32 - 149/16) / 27,75 + 1,375-b = (415/32 - 298/32) / 27,75 + 1,375-b = 117/32 / 27,75 + 1,375-b = 117/32 / 27,75 + 1,375b = - 117/32 / 27,75 - 1,375b ≈ -3,66 / 27,75 - 1,375b ≈ -0,132 - 1,375b ≈ -1,507
Ответ: b ≈ -1,507
1)
b = 1,55 x 25/31 + 3 29/30 : 0,4 = 1,55 x 25/31 + 119/30 : 0,4
b = 1,55 x 25/31 + 119/30 / 0,4
b = 39,25/31 + 119/30 / 0,4
b = 1,26 + 3,96666 / 0,4
b ≈ 1,26 + 9,9167
b ≈ 11,177
Ответ: b ≈ 11,177
2)
-b = (13 1/32 - 9 9/16) / 27,75 + 1,375
-b = (415/32 - 149/16) / 27,75 + 1,375
-b = (415/32 - 298/32) / 27,75 + 1,375
-b = 117/32 / 27,75 + 1,375
-b = 117/32 / 27,75 + 1,375
b = - 117/32 / 27,75 - 1,375
b ≈ -3,66 / 27,75 - 1,375
b ≈ -0,132 - 1,375
b ≈ -1,507
Ответ: b ≈ -1,507