a)

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{47}\\{35}\end{array}}\\\hline{\,\,\,\,82}\end{array}\)                                    \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{82}\\{47}\end{array}}\\\hline{\,\,\,35}\end{array}\)

\(\begin{array}{*{20}{c}}{ + \begin{array}{*{20}{c}}{526}\\{147}\end{array}}\\\hline{\,\,\,\,673}\end{array}\)                                \(\begin{array}{*{20}{c}}{ - \begin{array}{*{20}{c}}{673}\\{147}\end{array}}\\\hline{\,\,\,526}\end{array}\)

b) 350 + 42 – 105 = 392 – 105 = 287

     1 000 – 300 + 77 = 700 + 77 = 777.

ket qua la 7913.6

13.7.18+82.10.5+82.32

= 246.6 + 861 + 2624

= 3731.6

82 + 18 = 100

82 + 29 = 111

Chúc bạn hok tốt nha!@

82 + 18 = 100

82 + 29 = 100

82+18=100

82+29=111

1,7x18+82x10,5+82x3,2

=82x(10,5+3,2)+13,7x18

=82x13,7+13,7x18

=13,7x(82+18)

=13,7x100

=1370

=1370 nha

Tk cho mk nha  

=13,7x18+82x(10,5+3,2)

=13,7x18+82x13,7

=13,7x(18+82)

=13,7x100=1370

=100

ai k minh minh k lai

82+18=100 mình nhanh nhất k nhé

Theo minh la: 82+18=100

Nho k cho minh do ! thank you!!!

xxx + 18 = 82

xxx=82 - 18 

xxx = 64

2x  = 82 -18

2x  = 64

x    = 32 

Vậy x = 32

Ta có :\(x\times x+18=82\)

\(\Rightarrow x\times x=82-18=64\)

Do \(64=\left(-8\right)^2=8^2\)

\(\Rightarrow x=8\)hoặc \(x=-8\)

-82 + a - 18 - 2a 

=> -100 - a

vậy biểu thức thu gọn là 

-100-a

k nhé 

cảm ơn

hihi

-82+a-18-2a

Suy ra -100-a

Vậy biểu thức thu gọn là:

-100-1

k nhé

cảm ơn

hihi

3.18.12 + 4.82.9

= 3.12.18 + 4.9.82

= 36.18 + 36.82

= 36.(18 + 82)

= 36.100

= 3600

3600