2 2/5x25/18
9/11:2 2/5x2 3/4
10:35/24:36/7
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a.67+( -2018)+33+2018-189
=[(-2018)+2018]+(67+33)-189
=0+100-189
=100-189
= -89
a) \(2\frac{2}{5}\cdot\frac{25}{18}=\frac{12}{5}\cdot\frac{25}{18}=\frac{300}{90}=\frac{10}{3}\)
b) \(\frac{9}{11}:2\frac{5}{2}\cdot2\frac{3}{4}=\frac{9}{11}.\frac{2}{9}\cdot\frac{11}{4}=\frac{1}{2}\)
c) \(10:\frac{35}{24}:\frac{36}{7}=10\cdot\frac{24}{35}\cdot\frac{7}{36}=\frac{4}{3}\)
d) \(10,77\cdot9,8+5,23\cdot9,8=9,8\cdot\left(10,77+5,23\right)=9,8\cdot16=156,8\)
e) \(1,26\cdot3,6:0,28-6,2=16,2-6,2=10\)
\(2\frac{2}{5}\) x \(\frac{25}{18}\) = \(\frac{12}{5}x\frac{25}{18}=\frac{10}{3}\) x = nhân
\(\frac{9}{11}:2\frac{5}{2}x2\frac{3}{4}\) = \(\frac{9}{11}:\frac{9}{2}x\frac{11}{4}=\frac{2}{11}x\frac{11}{4}=\frac{1}{2}\)
\(10:\frac{35}{24}:\frac{36}{7}=\frac{48}{7}:\frac{36}{7}=\frac{4}{3}\)
\(10,77x9,8+5,23x9,8=\left(10,77+5,23\right)x9,8=156,8\)
\(1,26x3,6:0,28-6,2=4,536:0,28-6,2=16,2-6,2=10\)
a,13^40>2^161
b,81^80>27^90
c,3^77>7^38
d,5^36>11^24
g,2^11<5^35
B=2006 * 2008 -3 / 2005 + 2005 * 2008
B=(2005+1)* 2008 -3 / 2005 +2005 *2008
B=2005 * 2008 + 2008 -3 / 2005 +2005*2008
B=2005 * 2008 + 2005 / 2005 +2005 * 2008
B= 1
22/5x25/18=6/1/9
9/11x22/5x23/4=1/67/968
1/1/3