27.75 + 25.27 – 150

= 27(75 + 25) - 150

= 27.100 - 150

= 2700 - 150

= 2550

hoặc

27.75 + 25.27 - 150

= 2025 + 675 - 150

= 2700 - 150

= 2550

27.75 + 25.27 – 150

= 27(75 + 25) - 150

= 27.100 - 150

= 2700 - 150

= 2550

hoặc

27.75 + 25.27 - 150

= 2025 + 675 - 150

= 2700 - 150

= 2550

# chúc bạn học tốt.

a) \(26+150+74=\left(26+74\right)+150=100+150=250\).

b) \(35.46+54.35=35.\left(46+54\right)=35.100=3500\).

c) \(\left(-31\right)+\left[20-\left(7-4\right)^2\right]=\left(-31\right)+20-3^2=\left[\left(-31\right)-9\right]+20=-40+20=-20\)

\(\frac{5^4.20^4}{25^5.4^5}=\frac{5^4.\left(5.2^2\right)^4}{\left(5^2\right)^5.\left(2^2\right)^5}=\frac{5^4.5^4.2^8}{5^{10}.2^{10}}=\frac{5^8.2^8}{2^{10}.2^{10}}=\frac{1}{5^2.5^2}=\frac{1}{25.4}=\frac{1}{100}\)

100000000

100000000000

=1/1000

Ê , làm thế này nhanh hơn đấy : 
 (5.20)^4/ (25.4)^5 = 100^4/100^5 = 1/100

a)  4 24 - 3 54 + 5 6 - 150

= 8 6 - 9 6 + 5 6 - 5 6

= - 6

=\(y=\frac{\left(2^2\right)^{21}.3^{40}}{\left(2.3\right)^{41}}=\frac{2^{42}.3^{40}}{2^{41}.3^{41}}=\frac{2}{3}\)

bạn bấm máy tính nha

\(\frac{75.5^4+175.5^4}{20.25.125+625.75}\)

=\(\frac{3.25.5.125+7.25.625}{4.5.25.125+625.3.25}\)

=\(\frac{3+7}{4+3}\)

=\(\frac{10}{7}\)

a: \(150+50:5+2\cdot9\)

=150+10+18

=178

a) (–5).6 = – (|–5| . |6|) = – (5.6) = –30.

b) 9. (–3) = – (|9| . |–3|) = –(9.3) = –27.

c) (–10) .11 = – (|–10| . |11|) = –(10.11) = –110.

d) 150 . (–4) = – ( |150| . |–4|) = –(150.4) = –600.

Thuộc bảng cửu trương ko ?