mu là mũ nha giúp tui vứi

a) \(82^2-18^2=\left(82-18\right)\left(82+18\right)=64.100=6400\)

b) \(26^2+52.24+24^2=26^2+2.26.24+24^2=\left(26+24\right)^2=50^2=2500\)

c) \(\dfrac{93^3+78^3}{171}-93.78=\dfrac{\left(93+78\right)\left(93^2-93.78+73^2\right)}{171}-93.78\)

\(=\dfrac{171\left(93^2-93.78+73^2\right)}{171}-93.78\)

\(=93^2-93.78+73^2-93.78\)

\(=93^2-2.93.78+73^2=\left(93-73\right)^2=20^2=400\)

24 + 56 – 18 = 80 – 18 = 62

82 – 37 + 45 = 45 + 45 = 90

a) 24+56-18=80-18=62

b) 82-37+45=82-82=0

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  

\(=82^2-2.18.82+18^2=\left(82-18\right)^2=64^2=...\)

Để xem, \(64^2=2^{12}=4096\)

A=13,7 x 18 +82 x (10,5 +3,2)=13,7 x 18 +82 x 13,7=13,7 x 100=1370

A= 13,7 x 18 + 82 x 10,5 + 82 x 3,2 = 13,7 x 18 + 82 . (10,5 + 3,2) = 13,7 x 18 + 82 x 13,7 = 13,7 x (18 + 82) = 13,7 x 100 = 1370

\(\Rightarrow\) A = 1370

\(49(82+18)+100+50(89+11)\)

\(=49\cdot100+100+50\cdot100\)

\(=100\left(49+50+1\right)\)

\(=100\cdot100=10000\)

49 . (82 + 18) + 100 + 50 . (89 + 11)

= 49 . 100 + 100 + 50 . 100

= 100.(49 + 1 + 50)

= 100 . 100

= 10000

 A = 13,7 x 18 +   82 x 10,5  +  82 x 3,2

    = 82 x ( 10,5 + 3,2 ) + 13,7 x 18

    = 82 x 13,7 + 13,7 x 18

    = 13,7 x ( 82 + 18 )

    = 13,7 x 100

    = 1370

Hok tốt !

A= 13,7 x 18 + 82 x 10,5 + 82 x 3,2

= 13,7 x 18 + 82 x (10,5+3,2)

= 13,7 x 18 + 82 x 13,7

= 13,7 x (18+82)

= 13,7 x  100

= 1370

ta có A=13,7x18-10,5x18-3,2x18+102x10,5+100x3,2

A=18x(13,7-10,5-3,2)+100x10,5+100x3,2+2x10,5

A=18x0+100x(10,5+3,2)+21

A=0+100x13,7+21

A=1370+21=1391

446688 x 18 + 446688 x 82 = 446688 x (18+82) = 446688 x 100 = 44668800

Nhấn đúng cho mk nha!!!!!!!!!!!!

= (79+21)+(82+18)

=40+100

=140

k mk nhé

= (79+21) + (82+18)

= 100 + 100

= 200