Question

tính hợp lý

B=\(\frac{4^2.25^2+32.125}{2^3.5^2}\)

Answer 1

Trả lời :

\(B=\frac{4^2\cdot25^2+32\cdot125}{2^3\cdot5^2}=\frac{\left(2^2\right)^2\cdot\left(5^2\right)^2+2^5\cdot5^3}{2^3\cdot5^2}=\frac{2^4\cdot5^4+2^5\cdot5^3}{2^3\cdot5^2}=\frac{2^3\cdot5^2\left(2\cdot5^2+2^3\cdot5\right)}{2^3\cdot5^2}\)

\(=2\cdot5^2+2^3\cdot5=2\cdot25+8\cdot5=50+40=90\)

Answer 2

\(B=\frac{4^2\cdot25^2+32\cdot125}{2^3\cdot5^2}\)

\(B=\frac{2^4\cdot5^4+2^5\cdot5^3}{2^3\cdot5^2}\)

\(B=\frac{2^4\cdot5^3\left(5+2\right)}{2^3\cdot5^2}\)

\(B=\frac{2^4\cdot5^3\cdot7}{2^3\cdot5^2}\)

B = 2 . 5 . 7

B = 70

Không chắc =))

Answer 3

\(B=\frac{4^2\cdot25^2+32\cdot125}{2^3\cdot5^2}\)

\(\Rightarrow B=\frac{\left(2^2\right)^2\cdot\left(5^2\right)^2+2^5\cdot5^3}{2^3\cdot5^2}\)

\(\Rightarrow B=\frac{2^4\cdot5^4+2^5\cdot5^3}{2^3\cdot5^2}\)

\(\Rightarrow B=\frac{2^3\cdot5^2\cdot\left(2\cdot5^2+2^2\cdot5\right)}{2^3\cdot5^2}\)

\(\Rightarrow B=2\cdot5^2+2^2\cdot5\)

\(\Rightarrow B=2\cdot25+4\cdot5\)

\(\Rightarrow B=50+20\)

\(\Rightarrow B=70\)

Answer 4

\(B=\frac{4^2.25^2+32.125}{2^3.5^2}\)

\(B=\frac{\left(2^2\right)^2.\left(5^2\right)^2+2^5.5^3}{2^3.5^2}\)

\(B=\frac{2^4.5^4+2^5.5^3}{2^3.5^2}\)

\(B=\frac{2^4.5^3\left(1.5+2.1\right)}{2^3.5^2}\)

\(B=\frac{2^4.5^3.7}{2^3.5^2}\)

\(B=\frac{2.5.7}{1}\)

\(B=70\)

Answer 5

Trả lời :

\(B=\frac{4^2\cdot25^2+32\cdot125}{2^3\cdot5^2}=\frac{\left(2^2\right)^2\cdot\left(5^2\right)^2+2^5\cdot5^3}{2^3\cdot5^2}=\frac{2^4\cdot5^4+2^5\cdot5^3}{2^3\cdot5^2}=\frac{2^3\cdot5^2\left(2\cdot5^2+2^3\cdot5\right)}{2^3\cdot5^2}\)

\(=2\cdot5^2+2^3\cdot5=2\cdot25+8\cdot5=50+40=90\)