1/2x5/8=
6 x5/3 7:8/4+1/3 2x5/8-1/2 3/7:5/6x1/4
10
\(\dfrac{23}{6}\)
\(\dfrac{3}{4}\)
\(\dfrac{9}{70}\)
6 x5/3=10 7:8/4+1/3=23/6 2x5/8-1/2=3/4 3/7:5/6x1/4=9/70
1+2x5-8+29÷2+6-9+6-8+3-7+6+8+12-134+567=????
1+2x5+6x5-8-8x69-969+5x5+6+4+4+4-5x6
8:2x5=
(-0.2)^2x5-(8^2x9^5)/3^9x4^3
\(=0.04\cdot5-\dfrac{2^6\cdot3^{10}}{3^9\cdot2^6}=0.2-3=-2.8\)
So sánh: 2^8 và 2x5^3
28=256
2x53=2x125=250
Vì 256 > 250
Nên 28 > 2x53
Tìm x E Z
220+(2^4+(x-5)]=8^2x5
\(\Leftrightarrow220+16+x-5=64.5=320\\ \Leftrightarrow231+x=320\\ \Leftrightarrow x=89\)
160:{l-17l+[3^2x5-(14+2^11:2^8)]}
Tính nhanh (85+3) x 8 x(2x12-2x7-2x5