Question

Решить а+в= если а=(100,8+42,5)*1/5+11,9 в=1 1/2*(2,652: 1,3-1 17/30+0,,26-5/24: 25/42): 10

Answer 1

А=(100,8+42,5)×¹/₅+11,9= 40,56
100,8+42,5= 143,3
143,3 ×¹/₅ = 143,3 ×0,2 = 28,66
28,66+11,9=40,56

В=1¹/₂×(2,652:1,3-1¹⁷/₃₀+0,06)-(14,26-⁵/₂₄:²⁵/₄₂):10= - 0,591
2,652:1,3=2,04
2,04+0,06 = 2,1
2,1 - 1¹⁷/₃₀=²¹/₁₀ - ⁴⁷/₃₀=⁶³/₃₀ - ⁴⁷/₃₀=⁶³⁻⁴⁷/₃₀=¹⁶/₃₀
1¹/₂×¹⁶/₃₀=³/₂×¹⁶/₃₀=³ˣ¹⁶/₂ₓ₃₀=¹⁶/₂₀=⁴/₅=0,8
⁵/₂₄:²⁵/₄₂=⁵/₂₄×⁴²/₂₅=⁵ˣ⁴²/₂₄ₓ₂₅=⁷/₂₀=0,35
14,26-0,35=13,91
13,91:10=1,391
0,8 - 1,391 = - 0,591

A+B = 40,56 + (-0,591)
A+B = 40,56 - 0,591
A+B = 39,969

Очевидно, Вы со скобками напутали)

Answer 2

$A=(100.8+42.5)* \frac{1}{5} +11.9$
$B=1 \frac{1}{2} *(2.652:1.3-1 \frac{17}{30} +0.06)-(14.26- \frac{5}{24} : \frac{25}{42} ):10$
$A+B=$ ?

$(100.8+42.5)* \frac{1}{5} +11.9=(100.8+42.5)* 0.2 +11.9=$$=143.3*0.2+11.9=28.66+11.9=40.56$
$A=40.56$

$1 \frac{1}{2} *(2.652:1.3-1 \frac{17}{30} +0.06)-(14.26- \frac{5}{24} : \frac{25}{42} ):10=$$=1.5 *(2.04-1 \frac{17}{30} +0.06)-(14.26- \frac{5}{24} * \frac{42}{25} ):10=$$=1.5 *(2.04 +0.06-1 \frac{17}{30})-(14.26- \frac{1}{6} * \frac{7}{5} ):10=$$=1.5 *(2.1 -1 \frac{17}{30})-(14.26- \frac{1}{6} * \frac{7}{5} ):10=$$=3.15- \frac{3}{2} * \frac{47}{30} -(1.426- \frac{7}{20}* \frac{1}{10}) =3.15- \frac{47}{20} -(1.426- 0.035)=$$=3.15- 2.35 -1.426+0.035=0.8-1.426+ 0.035 =-0.626+ 0.035=$$=-0.591$
$B=-0.591$

$A+B=40.56-0.591=39.969$

ответ:  39.969