Question

1) Thực hiện các phép tính : ( tính hợp lí nếu có thể )

a) \(\frac{4^2.3^3.125}{2^3.5^6.27}\) b) ( -0,25 ) : ( \(\frac{1^{ }}{2}\)) \(^2\)

c) \(\frac{2^3.\sqrt{64}.10^6}{\left(2^4\right)^3.5^5}\) d) \(\frac{6^2.4^3.10^4}{2^6.5^4.16}\)

e) \(40:\left\{\left[11+\left(26-3^3\right)\right]^{ }.2\right\}\)

f) \(\left[\left(-5,2\right)+\left(-7,8\right)\right]+\left(4,9\right)+7,8\)

g) \(\left\{\left[11+\left(4^2-2^5\right)\right].2\right\}.\sqrt{49}\)

h) (-15).0,23 + (-15) .0,77

Answer 1

1)

b) \(\left(-0,25\right):\left(\frac{1}{2}\right)^2\)

\(=\left(-\frac{1}{4}\right):\frac{1}{4}\)

\(=-1.\)

h) \(\left(-15\right).0,23+\left(-15\right).0,77\)

\(=\left(-15\right).\left(0,23+0,77\right)\)

\(=\left(-15\right).1\)

\(=-15.\)

Chúc bạn học tốt!